OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   % U9 T7 o( e1 q
4. *
   ( S; a) M6 i" g3 Y  b( U& l- n! J
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
     X8 @; z' Q5 c& D! T( d) ~& k% j9 S  x
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
     I. h  D) ~7 L+ D
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    8 `* Z* R) _% J3 ]; `. Y
12. *
    : |& @# F) y( x; @
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
      {' C; V+ S1 R0 ~* G6 F. S% r
16. * modify it under the terms of the GNU General Public License as
    0 b" v, B6 p8 a- W- {
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    5 U; V  o# ?% {1 \, K* z& B
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ! c6 E0 T5 L1 X+ R
23. */
    
24. 
    
25. #include <linux/module.h>
    / Y! l1 b7 [- T$ Q
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    9 a+ y: J+ R$ D) J  Z
28. #include <linux/types.h>
    ( r1 u. y2 H+ P5 ?5 g; _
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ) `% R6 {; q" \  Q, G# S
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    & e/ N3 |' a, s& e" I
37. #include <mach/hardware.h>
    * ]" ?( J8 n1 w8 e
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    1 T: v6 k' |1 d1 I) @% C( Q% a
40. 
    
41. #undef EDMA3_DEBUG
    + c9 s( F7 I5 q! F0 L" M! R
42. /*#define EDMA3_DEBUG*/
    
43. 
    5 f: O) m; p9 N: F, X( r
44. #ifdef EDMA3_DEBUG
    ! K. j- `5 X: }0 j% |
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    1 x' [% _# n  g( ~* G
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ! H0 N$ g- B6 ]# I
48. #else
    + `) W3 t& w' x( V8 F
49. #define DMA_PRINTK( x... )
    7 `5 \( T- V- K6 n7 |) P* h
50. #define DMA_FN_IN
    1 y1 F- E2 h6 c$ {" b
51. #define DMA_FN_OUT
    
52. #endif
    - `8 e: b% S. l, `0 P# k
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 H" x" y$ K  }( v9 x: q
56. #define TCINTEN_SHIFT               20
    " I" W5 J( @: D2 a: D) Y2 {
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ( e+ E" D0 N- }/ ?% u$ G
60. 
    
61. static volatile int irqraised1 = 0;
    ) Y4 _# q. ~; v) E; Z( g
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) j& g) E' G' N" b5 D
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / T* ?! T7 j+ y4 S
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    / d' v8 g$ A; b: y5 @
68. dma_addr_t dmaphyssrc1 = 0;
    % V: ]0 ]- G! S; Y) }
69. dma_addr_t dmaphyssrc2 = 0;
    8 t2 w( K' `7 j" k2 }! U
70. dma_addr_t dmaphysdest1 = 0;
    7 P' B, S9 f9 g, s' L0 Q; c
71. dma_addr_t dmaphysdest2 = 0;
    ; b% ^& A/ ^2 x& H5 L5 U1 b
72. 
    
73. char *dmabufsrc1 = NULL;
    
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. 
    9 ^# u& A. S6 `3 d# i
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    " f" Z6 v+ L& W1 u; `
84. module_param(ccnt, int, S_IRUGO);

复制代码

. v! i) P( C2 f' e9 M! }- ~
      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
' m; ?0 A* @# M8 Z* Q3 \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。
6 J& C# G& Z* k) k     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
# ^8 E/ j6 G7 }) f! _. j" I" o

$ a" X  \) s4 r' b$ ?4 B