OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   - ]+ {  G: |7 h3 G; H) P0 s
2. /*
   ' b, x/ }* P* \( h7 ?
3. * edma_test.c
   3 ~8 n) K4 l# ?! m
4. *
   
5. * brief  EDMA3 Test Application
   ! @& y8 E- h0 h; O
6. *
   8 V$ L, T+ [- L, x/ M' U  S
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / g5 Q5 y  S  o- i
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/
    5 L; g& y4 m. G2 [; o) ^/ j
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
    * S  h( ]3 |( |" `. z6 M
17. * published by the Free Software Foundation version 2.
    5 F/ ^, h4 b* d  M1 }
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    0 h+ D5 |8 }. l* F& ^
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    4 i0 X$ r! p2 K) `# \9 ~6 A
23. */
    
24. 
    ! p7 t- E* c0 M
25. #include <linux/module.h>
    2 k4 n# W7 p2 U& @0 H: D
26. #include <linux/init.h>
    $ z6 u' m+ s6 K* I" x; }0 o4 z
27. #include <linux/errno.h>
    * i; q, T" W+ _
28. #include <linux/types.h>
    . G7 ~4 H6 g6 M% k) i
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " J/ S- [9 E2 n, b! ?
31. #include <linux/moduleparam.h>
    9 n- j; i3 G0 R: v
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    $ L# y+ K/ X' B/ ~
36. #include <mach/memory.h>
    * e  Z2 g$ ~  M/ M1 O. j0 O
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    & [' t% v& _! r# [: }9 z
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    " q$ ]5 e$ r) F1 S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    - n4 v& U1 p0 D! H* C: c$ D
50. #define DMA_FN_IN
      {' F9 q& [+ m) q, a: Y4 L" p
51. #define DMA_FN_OUT
    4 i0 M+ u' K6 ]2 I7 M: p
52. #endif
    
53. 
    8 [- \# _2 z% S( |
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - {1 O& G' U( D
56. #define TCINTEN_SHIFT               20
    # }& k5 I6 d0 H# l! a) J# l$ ^
57. #define ITCINTEN_SHIFT              21
    5 u; R4 M; G) D( L
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / C; c# z2 I3 M* B, h
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 E' _: v2 ^. h! ^: `
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);
    3 Y9 N0 B4 x* ]" E. S
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    , N! f3 |# h- m; z  H/ \
70. dma_addr_t dmaphysdest1 = 0;
    . @! B! m, `* O5 C* y* Q% l( o
71. dma_addr_t dmaphysdest2 = 0;
    : c  Y2 ?  p5 V! F, [; {7 S
72. 
    ) ?, N4 q' P* m
73. char *dmabufsrc1 = NULL;
    ; q( g+ P/ ]: b
74. char *dmabufsrc2 = NULL;
    8 m; l4 ^2 Y: V0 _4 K, n
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    6 R8 ~  X& G' }. Z% Q; v
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    % `2 z% a. C- B" @
81. 
    
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

      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 o0 j# O( \7 L* C/ ~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。


% m* `+ @+ r- ]6 S) y8 x6 G