OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( J$ E: z* W  ~
2. /*
   
3. * edma_test.c
   
4. *
   7 J) b- v  }" u' a  l
5. * brief  EDMA3 Test Application
   
6. *
   * R6 T+ H7 F7 t3 [0 C! Z
7. *   This file contains EDMA3 Test code.
   
8. *
   $ q' E3 ]! K1 y* ?7 g
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . r. F4 \! o* ^# ^! K( ]( W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    : v0 Y! ], Y% b
12. *
    ) ]. o  J& z; ~' Z: g  q
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
    # t) U; i: S5 s! W+ a) [( U8 K
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
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    5 R; l( _& W& E9 M- E. C
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    / W$ v' p* d$ Z9 ?2 v7 {
27. #include <linux/errno.h>
    ) m" _  h$ @) C, p$ F5 h3 t* p9 Z4 y2 ^
28. #include <linux/types.h>
    * W8 ?. l  X+ {& N2 ^
29. #include <linux/interrupt.h>
    3 t: K& L- g0 W4 d! s
30. #include <asm/io.h>
    . U+ }& U) k' }6 f& [! ]8 F
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>
    / d* k& n( ~7 y- T& t2 K
37. #include <mach/hardware.h>
    $ r& Q! |+ [- o/ C: `
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    # G3 z, H: {+ W/ Q8 {" d
40. 
    
41. #undef EDMA3_DEBUG
    . z( A/ Y/ F3 C7 c$ j
42. /*#define EDMA3_DEBUG*/
    4 F0 b; F. j; h: m7 Y
43. 
    0 }% `* P* h- t
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 t! V- t+ T+ i5 l5 s5 y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 `' P* f& p! c0 H0 J( G+ @
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ( R: z5 q! G! j* _1 c
48. #else
    0 m; j8 a( S. l1 K% F1 _) g
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    1 t0 H4 b; F* R3 d
51. #define DMA_FN_OUT
    
52. #endif
    * v; j5 ?4 {2 R+ |( }1 O( |
53. 
    # {4 P, }1 a$ J5 v
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    6 O& O5 i6 W) x+ i0 U0 r/ e4 P/ A
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ( Y4 o; K3 i* [
57. #define ITCINTEN_SHIFT              21
    * W( {1 `4 Q/ n% m+ g( Z5 _
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    % P' H0 G1 u$ M- Y- h
60. 
    + b8 W7 L1 a( W- t0 R+ g* X
61. static volatile int irqraised1 = 0;
    + [2 E1 W' Q/ y$ v0 S# z
62. static volatile int irqraised2 = 0;
    " u3 g& M6 o2 a) e9 i/ F
63. 
    & N3 j& L+ K9 O& `& G
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);
    
67. 
    ) W2 r  x- m5 W& ]
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    . C& x9 l7 Y2 }4 H
70. dma_addr_t dmaphysdest1 = 0;
    ; F5 k, U9 T/ N+ U2 J# @) c
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    7 j0 Q; {: [4 |3 o5 h# E
73. char *dmabufsrc1 = NULL;
    0 ^* r' ]- ?. ^( [6 A
74. char *dmabufsrc2 = NULL;
    0 C7 U6 I2 S8 W) {3 A
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    $ p2 q6 b. l- d( y
78. static int acnt = 512;
    - v- [( q0 }2 e* ?$ s% o3 Y
79. static int bcnt = 8;
    ) A* m: g) b" }7 {, F
80. static int ccnt = 8;
    ; e' A4 u9 a% E; D3 |
81. 
    
82. module_param(acnt, int, S_IRUGO);
    , t" }4 ~3 r) a8 V" I
83. module_param(bcnt, int, S_IRUGO);
    + ?5 O4 d5 r* B8 Q3 l8 `  ~6 y
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
% v: R$ H4 N( s- M) tarm-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。
/ Z! c7 R, f% o4 ?, ~     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 g2 P7 x# t; K4 {3 ]2 |. e2 F