OMAPL138如何在Linux下使用EDMA3驱动

yyj

. H) Q5 m! z$ X

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   # ]  U& [& Y( ~, D% z4 F2 @
4. *
   . F- u6 a$ K6 [& y: Z# Q' L8 k
5. * brief  EDMA3 Test Application
   . Q$ M8 D4 T- Z9 B* {' c
6. *
     K! T) \& M3 G; i: a
7. *   This file contains EDMA3 Test code.
   ( D, d: h* l. j- M( l
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
    " K% R% h3 p7 O* t9 Y
11. *         TO CHANGE.
    
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
    
16. * modify it under the terms of the GNU General Public License as
    ; @$ Q' `5 `' i  {4 p0 j
17. * published by the Free Software Foundation version 2.
    * o! A4 ~+ \# X- o
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    7 z# W. u" f. |1 k# M
22. * GNU General Public License for more details.
    
23. */
    + F; y+ }; J1 K6 C% t+ o
24. 
    
25. #include <linux/module.h>
    % t# I. z( ]" }
26. #include <linux/init.h>
    ) j9 e" Z" j: ]. s( X
27. #include <linux/errno.h>
    - g! y9 F% h( F
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    " I$ ~0 K* Q% t
32. #include <linux/sysctl.h>
    3 ]) J2 s& T* Y3 X+ y; s4 @( h) n$ ]  U
33. #include <linux/mm.h>
    " p5 {9 L  t, r3 w/ [
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    , H0 X3 u5 B. ?1 u. ]3 r& Y8 w6 K
38. #include <mach/irqs.h>
    + p/ J3 c9 b  Y' s  x% ~' T9 m
39. #include <asm/hardware/edma.h>
    , P, Z! v8 Q$ o5 j% e% }! O
40. 
    
41. #undef EDMA3_DEBUG
      p  ^' u, [2 D0 y( N' S& O
42. /*#define EDMA3_DEBUG*/
    
43. 
    ( x1 W3 |$ ]/ J+ ?# ~
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( S9 g3 e$ F- j3 @8 M5 Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' R' F. C& [; P. V
48. #else
    : I% d6 J& X3 J2 \8 l
49. #define DMA_PRINTK( x... )
    : ^. Z* d3 G3 _0 }4 t
50. #define DMA_FN_IN
    " E7 F# A9 ^1 e, L( V4 A0 d6 K
51. #define DMA_FN_OUT
    
52. #endif
    0 P! K: t: i; g* @8 u3 r" M% ?, P
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    # h5 r! b) k5 q: t
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    $ \, q( H2 D, Y0 D
57. #define ITCINTEN_SHIFT              21
    1 m* G, j. ?% b! `+ |
58. #define TCCHEN_SHIFT                22
    8 A  M' J; r, i" G' b% F
59. #define ITCCHEN_SHIFT               23
    9 y& R+ ~8 L6 ?0 }8 X# n
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 m( b/ R3 }+ b$ B( S
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - ?7 C1 K$ K4 M- C' E
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 v+ }( Q4 S6 t5 y0 q( [! [. U& Z: f: p3 t, z
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    & x8 v! D* c( t" ?
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    - {( U! s; B2 t+ m; c# o! b
76. char *dmabufdest2 = NULL;
    
77. 
    * m$ T: L% J& }
78. static int acnt = 512;
    " d( j. U) T% k! O, e2 G
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    + _5 [, O' E3 R! E3 A: k5 T* y9 B4 {5 }
81. 
    $ \; L- O+ n" u! u% s/ x: B
82. module_param(acnt, int, S_IRUGO);
    4 v" y/ \/ e2 `: [. @
83. module_param(bcnt, int, S_IRUGO);
    2 A. C8 {6 M1 q% U3 B$ V
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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。
- P% r* H5 m. X2 {4 B9 Z

9 S! O* w" B2 I* q& W