OMAPL138如何在Linux下使用EDMA3驱动

yyj

% m1 b* N' F' k" Y- x

1. [code]EDMA sample test application
   1 v6 J: }0 k% k
2. /*
   
3. * edma_test.c
   
4. *
   4 m2 @7 o1 Y3 W
5. * brief  EDMA3 Test Application
   . o/ \' j2 x9 c' h; p! F+ e
6. *
     a$ A' T4 Z7 l/ A+ ~+ g
7. *   This file contains EDMA3 Test code.
   5 y+ E9 b1 C! h4 d
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
    + X0 _4 F# p$ y
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 m: n& u6 p# _* z/ ~0 U
14. *
    
15. * This program is free software; you can redistribute it and/or
    $ l* O0 Q% W' s
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    : `/ S* ]! g$ A3 {8 \
18. *
    - A6 d! ~# \3 ]. }' z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' D2 n2 x! R% V: T. {+ O0 h6 h* K4 P
20. * kind, whether express or implied; without even the implied warranty
    ) i' H8 O: T8 H( v
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; }: d* S7 X! c4 ^; }: A6 c( d
22. * GNU General Public License for more details.
    : }- j6 g% \! ]# W& R$ Y7 O) A0 \
23. */
    
24. 
    0 b* A- n) p9 `3 n$ {' K5 M' U$ }
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 r# R. E$ w" |5 h' ^* p6 c
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ' c1 c, a& i. h& n" ~+ i6 @
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    * }) f6 w, m/ R" m3 t/ h
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    0 q) \  b9 x! D: M" f* e
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    2 |# H# U4 j1 M" P* [  I, M1 g
38. #include <mach/irqs.h>
    6 j; y$ Z8 l: @. t' b% I& \" E' w, T
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ( P% ?! z( x  ~# I3 R2 G2 }* \8 T
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ) q1 A6 O4 W4 s$ z
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__)
    
48. #else
      x+ ?) p6 E1 E6 I3 {+ o
49. #define DMA_PRINTK( x... )
    1 N1 D! o6 k0 U/ A" C% n
50. #define DMA_FN_IN
    ' u" F  h) q" Z7 ]4 g1 q/ V
51. #define DMA_FN_OUT
    6 m' ~; n6 j$ ]
52. #endif
    , }* g1 e" K0 U3 v  U. a
53. 
    2 a& R4 ~3 ]$ L# X8 f
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    " N4 o/ I" r$ {( I
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    . d4 U6 |8 ]) A
60. 
    
61. static volatile int irqraised1 = 0;
    . @' A( M8 @4 T6 @. g
62. static volatile int irqraised2 = 0;
    
63. 
    : I! a* |# M0 d* g* y, p, P
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);
    # ~# ]* n. ~. _+ p& ~
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;
    " i9 Y2 J1 [$ X$ Q* z
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ; G1 R: v# u" z! C3 ~2 U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    * P! N' P  M! ~) c% e( L: T9 x
75. char *dmabufdest1 = NULL;
    : B. q- ]) {" |6 f- r$ w
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    # T2 m) f6 a( o
80. static int ccnt = 8;
    
81. 
    ( D$ m( _; C9 e$ L% Q7 q) T
82. module_param(acnt, int, S_IRUGO);
    6 N1 [7 e  d7 u8 e2 k
83. module_param(bcnt, int, S_IRUGO);
    ! R2 i& |: g. ^
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 \7 d2 U$ @4 v* a; 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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
& M' y- d4 X0 x" e7 |- [+ g
) t% d: b$ S/ d9 z
& U8 w, A/ H  _! N2 j3 Y, c; o4 Y+ H, u