OMAPL138如何在Linux下使用EDMA3驱动

yyj

, `( u% b; R# q4 {

1. [code]EDMA sample test application
   3 I+ h! l# y$ z7 o
2. /*
   ) L; D( b/ }2 O* y! I, [
3. * edma_test.c
   0 n) ]+ W1 A2 ?2 m5 }4 E
4. *
   # \5 u: a2 Z$ }! s
5. * brief  EDMA3 Test Application
   8 p( d/ z/ U1 F* L
6. *
   9 O' G- w  S: \. Q0 e( K
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. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    7 A; z7 A  ]: g/ g9 S6 C& N1 |
15. * This program is free software; you can redistribute it and/or
    . f1 _. K' w' O) M$ D9 V$ H
16. * modify it under the terms of the GNU General Public License as
    0 L! G. T* k% M- [
17. * published by the Free Software Foundation version 2.
    9 N1 t( q8 H5 N0 J) P
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    / u, U! r  L; _/ C8 @
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.
    " y4 E3 z/ I& C: d1 ]
23. */
    
24. 
    
25. #include <linux/module.h>
    ; S  Z5 ^( s- h
26. #include <linux/init.h>
    7 d9 K: @$ @6 T% I
27. #include <linux/errno.h>
    9 i$ U3 d4 |' c# H( {% n
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    , _' l2 X; h3 C( @" P
30. #include <asm/io.h>
    ; P/ ^/ ^! J& l9 Z- T) f
31. #include <linux/moduleparam.h>
    . o# v- k) `- o+ h: r
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    6 q2 n1 X9 N1 @, d( x7 h0 ^
35. 
    % _+ q; ~- V, `- w- Y) B9 T
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    4 v3 Y- U8 \& S
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    # ~- |+ @6 J& l$ e" c$ _, U
41. #undef EDMA3_DEBUG
    . ^) `' W$ u$ e$ n, c( e) p2 C
42. /*#define EDMA3_DEBUG*/
    
43. 
    / E# D# E$ t) h) B8 Z% C8 g
44. #ifdef EDMA3_DEBUG
    3 A* w8 k- G, q. k
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    5 C  Q; g) p0 K0 v' P
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    . z5 q" X, x: i- A0 ~  l
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    , z; {7 ~. Q9 f- D- y
52. #endif
    1 z+ u! w( }: r1 l# ]. ~
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # m& a6 S* M5 N# J) l7 Q/ S
56. #define TCINTEN_SHIFT               20
    + t. n1 p' z& n3 G1 Y* Q. B. b3 m9 h
57. #define ITCINTEN_SHIFT              21
    ; M( |3 C* x1 o% Z# {7 g0 I$ I
58. #define TCCHEN_SHIFT                22
    ! l5 A3 W% `& S9 L) k2 u" a6 D$ p+ [
59. #define ITCCHEN_SHIFT               23
    7 N6 Q: p1 w7 N& X9 e* Q
60. 
    : _6 \* x" @$ K9 }7 v
61. static volatile int irqraised1 = 0;
    8 s" O$ C4 X6 h/ T4 [# n# F
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      q* o( |8 [( L3 ~
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    . s* p, n$ E2 C5 J& M2 w) M
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    2 D% m- g6 P  k! o+ ~  P
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;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ' b( T% M: u! H. t/ n
84. module_param(ccnt, int, S_IRUGO);

复制代码

! s5 E+ W  U: 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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
' H1 k/ ?4 g( D* r; R2 v1 U

; q6 r5 [% Y0 \