OMAPL138如何在Linux下使用EDMA3驱动

yyj

' G( }" t2 ^+ h+ j9 q' t

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   8 m" M' C3 d/ L: \8 B) A( X
4. *
   * x9 v2 G& x0 J
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   . x" {$ n) K% F
8. *
   ' }3 |. t9 l3 s) \
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
    & ^! X0 Y3 |  s* R2 t. }
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 u8 Y  \8 i$ `5 \0 B% @) _
16. * modify it under the terms of the GNU General Public License as
    & N- I  Y# B+ g9 o* l, {, L( O
17. * published by the Free Software Foundation version 2.
    7 T% Z: l3 Y+ J
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    1 l. ]& |* W5 y
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 ]: x% P8 S, @
22. * GNU General Public License for more details.
    7 l& ~# }# U3 ~& n" q
23. */
    
24. 
    : M# a0 z- F, ?+ I8 c7 @
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    8 z; p$ h0 N0 A9 E
28. #include <linux/types.h>
    * Z2 \" u& w) W% E% O
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    8 [6 R, @- F0 v$ [0 E4 d0 j
32. #include <linux/sysctl.h>
    7 r* T( R( t) Q- N( x9 t
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ' K& D, ~8 l$ {# v! i
36. #include <mach/memory.h>
    , ^  w5 s; c: u4 s0 L
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    2 Z$ X$ ^1 k) m. Y; _; J3 F
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    " G" K& t5 D4 T) x8 b+ Z
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    $ U6 F" B; c8 Z/ V3 e2 _
48. #else
    7 F* b! a+ J0 _( \* l
49. #define DMA_PRINTK( x... )
    ) N9 n1 U: [, n" S- y
50. #define DMA_FN_IN
    7 S  F8 b0 ?' N; W
51. #define DMA_FN_OUT
    
52. #endif
    : F. q/ {* N( l  {1 l/ o% I
53. 
    ' _8 S& F% l8 D0 {$ X
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    . ]' \# c5 }: y8 c
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    4 U) E& w0 M8 |4 I- o
58. #define TCCHEN_SHIFT                22
    . f9 X4 q& q( \9 L+ @9 W
59. #define ITCCHEN_SHIFT               23
    ! y" N% u9 e5 }- c; Q+ i' z
60. 
    
61. static volatile int irqraised1 = 0;
    , E" z" z. k2 b8 l% `) ^! \
62. static volatile int irqraised2 = 0;
    * \3 g$ r3 ^( I2 [: E3 v9 z
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ P4 h2 s, M2 U9 j+ Y' A. \  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);
    1 U* q1 F( d, ~% h
67. 
    , e; R; P+ D1 [* x% r) d
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    9 B. `6 P2 }( [& c# F
73. char *dmabufsrc1 = NULL;
      R1 a2 F4 v+ R/ M$ _
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    1 R( B& i, b: C+ y$ a8 W
76. char *dmabufdest2 = NULL;
    # X. o/ c  n/ N/ T" {
77. 
    ' v6 x9 K( g( z3 b7 O2 P
78. static int acnt = 512;
    ) j# F% u8 C# T$ ]( U
79. static int bcnt = 8;
    * C2 e+ }, h3 e( t8 H
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    : I8 h8 s1 w9 d1 d7 g) ~/ j
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 t* h! l. k$ S) ^
      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。
: c0 c" H8 @* j% ~6 Q- A     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* f9 h8 M4 J0 v$ [, B+ n
4 f. z% q# N5 J