OMAPL138如何在Linux下使用EDMA3驱动

yyj

" s" M  N; j$ @7 M

1. [code]EDMA sample test application
   0 l1 ]5 t. H: i  H9 @5 C3 z" O
2. /*
   $ e: ?* Q4 V3 x% D' u" ]4 {1 o
3. * edma_test.c
   7 r8 ~# {: k( i; E
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
     k; j' Y* i+ i) Y9 w9 U
7. *   This file contains EDMA3 Test code.
   & h6 d2 U# Y' l( A8 d! s6 t. j" R" y
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   7 g. N8 Z3 |& R3 ~% g8 Q; X
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    $ g- D7 U+ u3 r! }
11. *         TO CHANGE.
    # V% |; |- @( c1 V% W( o/ J* |3 w& G
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
    6 e5 z- a& l! J7 @- q3 @0 V
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    0 x% E% u" h, }* |
18. *
    * a" k( n, i3 j* d  K
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + F! B1 F3 B, v2 C; j
20. * kind, whether express or implied; without even the implied warranty
    & R" i1 h7 U+ s- F; F
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    6 @- G) Y: B9 w' L% _( K. e
23. */
    ' r  s4 T/ z. N) M1 P
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    1 e- i% \* B/ N* w! V
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    $ j$ Z( Z1 F6 g& h) D8 h. T
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    $ W: c' L% F9 h+ \8 L# Y, S1 f
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      H& s8 `" x$ C+ d
35. 
    
36. #include <mach/memory.h>
    % A+ N; X6 B$ T0 L1 Q
37. #include <mach/hardware.h>
    5 s( T# u$ P3 N( }; H% g1 z9 {+ [- T4 E
38. #include <mach/irqs.h>
    3 }2 l' _% Z1 h- `! \. e
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    5 R. A4 P5 w1 @$ W9 u- D
42. /*#define EDMA3_DEBUG*/
    
43. 
    6 C  A* ]! Z2 h# {( O/ h8 i
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    4 f9 ^& v: ]' f* z" k$ |" S
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    , a, v( M, J$ w8 t5 v% m9 M$ @
49. #define DMA_PRINTK( x... )
    # Q( i: y  F% I1 U% B" T
50. #define DMA_FN_IN
    $ F. D" s2 p  I: W; n: J, j  P
51. #define DMA_FN_OUT
    
52. #endif
    " K3 S2 g  n# x& d$ b0 t/ }
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ) H" v7 V: M. c$ z: V; a- M( h
59. #define ITCCHEN_SHIFT               23
    & c1 f/ o+ x- r9 j
60. 
    
61. static volatile int irqraised1 = 0;
    ' ]! R" s1 e1 I
62. static volatile int irqraised2 = 0;
    , G+ P0 @/ q9 R7 Q! V1 D
63. 
    
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);
    + K1 S) A* C7 e+ ?8 J: |
67. 
      n( G8 v9 C# ^- V1 v  I
68. dma_addr_t dmaphyssrc1 = 0;
      C1 U0 E/ I/ Y( x2 r5 g
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    # T* z& }7 T9 b9 j8 N* m, g
72. 
    6 u" _! f4 v, W" g5 Z, o
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    * W! b2 |7 Y$ p, L
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * ^; k) B1 s, W+ c& `% Q
80. static int ccnt = 8;
    ! R3 |7 ^! @# G6 E( {7 m/ n9 d
81. 
    5 u( I& V- l0 P. O  T( F3 S% ?/ O
82. module_param(acnt, int, S_IRUGO);
    7 R2 Y* t" E) N* k4 e
83. module_param(bcnt, int, S_IRUGO);
    0 `4 q' O3 T2 Z% @' w9 p" I
84. module_param(ccnt, int, S_IRUGO);

复制代码

: V1 E0 o" w4 n& m9 T- K) ?
      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。
2 _7 V+ t; ~) g$ N# H# `     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
9 P6 y; c9 m- x' ^$ y# e