OMAPL138如何在Linux下使用EDMA3驱动

yyj

; n4 V/ t$ Y0 b, R! [* l

1. [code]EDMA sample test application
   , {( w! |" `, y) l, r& b* A3 E
2. /*
     U0 V, L$ x1 `' D
3. * edma_test.c
   ; E+ a( x" }- I% `0 I
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   9 z+ h1 T3 ^. `% B1 V2 \+ Z
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' ?& K. u6 Z4 y5 A* ~( ^7 `5 d# X' t7 ^
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    : t3 j& i' Q* A' i* G/ z
11. *         TO CHANGE.
    ! ]) I( |1 ~+ Q* ~: @) _
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    : z* S# x! i& Z) x& N) t/ l
14. *
    1 S1 k; c- s1 ~$ F6 R* u8 `# A
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    2 p# ]( t6 ^8 T
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 f* o% o3 B3 P- |. @6 H
20. * kind, whether express or implied; without even the implied warranty
    ! j9 j8 T) w9 j( H9 ~" r% g
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; r. k# Z* K& N0 E6 ~
22. * GNU General Public License for more details.
    
23. */
    * n0 p# z# [* ^5 t/ {; `
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    1 }5 c+ g4 n) I: W  M
31. #include <linux/moduleparam.h>
    % r5 H' e. |* h8 j! }1 a& t( q. J8 @
32. #include <linux/sysctl.h>
    2 O& D: T2 l- s: Y
33. #include <linux/mm.h>
    ( z% g3 `% @# ]
34. #include <linux/dma-mapping.h>
    7 p  w% W$ a- Y! A! [
35. 
    ) a& k8 p+ p7 c; j4 |& _. o' n
36. #include <mach/memory.h>
    & \1 H: A, }% z1 s- k% U5 R: q
37. #include <mach/hardware.h>
    5 {9 Y+ r- d0 x/ o1 b: r
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ; g0 y. y* A! E
40. 
    
41. #undef EDMA3_DEBUG
    2 f: W, U) D0 j& o
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
      M  s" |$ w* z4 e
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
    1 f3 \: z+ P2 B) L1 `
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ! i; Q9 k- ^+ ^; P
51. #define DMA_FN_OUT
    
52. #endif
    4 F' j( q, o3 R; R8 h' m2 g  ^0 D
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
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , ~$ l% E* [1 }2 D, I* c
63. 
    - ?( R) I) l7 W& k' U4 x, L& Z: ^) m
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);
    6 M2 @6 w0 V! j; [% _
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    # r/ n7 e5 J. @( O1 p; `) K
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    " h2 H6 _4 l: v, p# l8 y" r
69. dma_addr_t dmaphyssrc2 = 0;
    8 Z4 H4 c# l/ h; _: q/ z
70. dma_addr_t dmaphysdest1 = 0;
    7 s8 I/ {/ E  V2 q7 k. D% E
71. dma_addr_t dmaphysdest2 = 0;
    & B  S# k7 Q2 o' F- k8 {
72. 
    ! M" `$ E6 Z2 d5 v; P
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    $ P6 z2 {' C# `; Y( v% O
76. char *dmabufdest2 = NULL;
    
77. 
    1 i* w8 m2 ~2 {  V. p. b
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ' f3 c( d% Q% D1 C+ L
82. module_param(acnt, int, S_IRUGO);
    # C- P; t" ~) q' {4 \3 t7 V
83. module_param(bcnt, int, S_IRUGO);
      q0 C' n& b+ d5 A7 `( \
84. module_param(ccnt, int, S_IRUGO);

复制代码

( M2 S! T* C+ p# S- O. _. r8 Q      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
+ `0 u% K: o  l1 w7 Warm-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。
+ p% F, y0 [$ F8 I' f$ |8 G+ ?, 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。

& T8 Q( x% H' Z& Z- S! M5 @% c" f* G
$ G: u6 j( S* Z: @6 z