OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   7 F8 k5 u! m( G( L
6. *
   
7. *   This file contains EDMA3 Test code.
   9 g% a# V. W& m2 l# d, l* M
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * [6 I# H' F3 }1 r0 P( z
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/
    + {' s: M( Y: Y2 T6 V; X  b. A
14. *
    8 H* B5 h. O) a+ m+ I5 Z( ~, X
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
    2 h9 L  r5 I# a9 ]1 J& F8 h% m  Z
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ( m+ B' P" P& M, [8 _( b
20. * kind, whether express or implied; without even the implied warranty
    , _7 h) ^/ _9 B% P/ Q3 A
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    # w% C; N, m1 S2 R. y8 X0 D
23. */
    
24. 
    & P1 x. d; ^, K0 ^
25. #include <linux/module.h>
    ) v  b6 b8 ]: V$ Q1 d4 ~/ F& E% @
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
      W" O& F  A% {( a
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    4 Z) l# v; `7 G4 A
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    . F! s! A9 Z  n
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    4 N; t* ?- s2 w: y
35. 
      t' N) [) i" a# C
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 L# Y; ]! I( u" {0 D" W# ?
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    7 V, Z& J& s! i- M
42. /*#define EDMA3_DEBUG*/
    . E  i; z4 C' ]$ Q) t7 M! h7 e
43. 
    , O6 {+ Q8 }3 `( h/ z4 A5 P) P
44. #ifdef EDMA3_DEBUG
    5 h- F8 i$ z$ O2 w3 v/ n% j, }
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ; B: @4 j+ d; [9 Q/ r5 N1 G
48. #else
    
49. #define DMA_PRINTK( x... )
    1 B8 |" ~* j. J' }+ A
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; ~+ K1 D; H) \# s
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
      y# r9 X: t3 x! I  O) E
55. #define STATIC_SHIFT                3
      I& r! e( [! ^
56. #define TCINTEN_SHIFT               20
    3 w4 U- `3 E% C( c
57. #define ITCINTEN_SHIFT              21
    % w( l0 Z3 ^- H- \" j4 w: L
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ( c2 H+ ~8 i* |6 D
60. 
    " t' O2 x7 U; E6 X+ d0 B3 `1 e: U
61. static volatile int irqraised1 = 0;
    9 H+ v7 p/ ]/ n: ?7 L
62. static volatile int irqraised2 = 0;
    : H7 H: R# O8 q* Y& k
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % }! Z% b! U8 s3 v4 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);
    4 e* V- |$ f6 w- s+ U( K
67. 
    - m' j6 s& n. B* d$ S8 V
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    * N" j1 ~+ Z; b; h
70. dma_addr_t dmaphysdest1 = 0;
    " s' P/ Q3 U9 Z: u" Z
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    2 k2 q: f# R2 L: N
73. char *dmabufsrc1 = NULL;
    # F' s6 g, ~# o5 V' C
74. char *dmabufsrc2 = NULL;
    - F5 t% s; y) y; h5 C( ^7 _- O* i& X
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    % {0 L( n/ Y' D( r: C$ p' ~
77. 
    - b$ ?5 n- b- k% M
78. static int acnt = 512;
    ' H  w7 O' A+ f3 ~
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);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

( h* P& J& I$ h- Q3 e7 w8 X      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。
8 k7 t/ U% {* [- C     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
' G! V* s+ X; r5 q
. |0 [# I7 B' l2 U7 C) |