OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ m8 J5 }& ?' c. U

1. [code]EDMA sample test application
   ' G- [6 R# T# A, k/ p6 A. O) l
2. /*
   
3. * edma_test.c
   - N( K* Y! D9 j4 O* M& @
4. *
   ( F5 p: x# o( i
5. * brief  EDMA3 Test Application
   & S" ?& [. l. h  [+ F+ j$ V0 R
6. *
   1 S( k1 P& b, D; I" B( o+ @1 |) b
7. *   This file contains EDMA3 Test code.
   
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
    
11. *         TO CHANGE.
    
12. *
    3 P' J9 }1 `6 r) s; w: b
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 m* P4 x6 f- @* R' ^$ ]
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. *
    ! A- I# d1 ?+ J0 M) P# ~& L
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      P# m2 f0 l, @; U4 H- D
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    $ e# z) ?8 @5 X. T
22. * GNU General Public License for more details.
    
23. */
    2 u$ v2 Y0 y8 }/ Y
24. 
    + f0 d# ~/ x1 @% L6 i1 D( E
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    " f! L9 u9 A& ]
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ' j) I6 f" p* h; K7 Y# `0 i, s
33. #include <linux/mm.h>
    1 ]& W. O6 q0 C
34. #include <linux/dma-mapping.h>
    
35. 
    % T  n8 ]/ e8 ~" L" k: q
36. #include <mach/memory.h>
    # Z' d" m( o$ P
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
      O# m: E3 `7 q8 U/ q# C  ^7 w( z0 L
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ' V' I- [3 Z7 f: {
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    " }; v: ?1 z$ n/ Q7 r
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    / E5 W% G) D; {7 ~
48. #else
    * y# R- L" |, q; \; a2 ^
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    $ i+ l9 a8 ~6 H3 S0 `: k
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    : {  K1 n, |7 I# |; q' y
55. #define STATIC_SHIFT                3
    % |# q9 @4 {1 G+ k/ b6 Z/ X
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % ?% z) z1 p+ n+ l
60. 
    4 {4 f  x- M  {+ A7 m1 b
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ; |+ u7 J1 Q' E
63. 
    * b' b5 o' Y% [6 b- D5 B' Q
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
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);
    2 m9 u4 U! M- e( G9 Z( |" c
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    , j$ u% P2 m2 Q% T3 v- a/ I
70. dma_addr_t dmaphysdest1 = 0;
    2 n! ~: \" R! m4 ^$ G/ Z$ ^$ r
71. dma_addr_t dmaphysdest2 = 0;
    " p/ p: i$ q* \" k8 z5 f* i6 p( z
72. 
    & g' u, G9 x/ _, H* j
73. char *dmabufsrc1 = NULL;
    8 {& m& w! H% W( N$ H
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    6 D: k( t: [1 K0 a( ]. S! v% E2 D! `
81. 
    
82. module_param(acnt, int, S_IRUGO);
    " z8 S& H2 Q; U- J
83. module_param(bcnt, int, S_IRUGO);
    * |# i5 j' \. `/ \* V5 j
84. module_param(ccnt, int, S_IRUGO);

复制代码

/ A( q1 ~" B; k3 \+ v4 [5 S7 u5 L" J
      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
3 R/ f4 |# w7 Rarm-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。
5 M+ [1 e) ?4 S; E. Q     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。