OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   4 }3 a! ^! k: v# {* k# o
2. /*
   
3. * edma_test.c
   
4. *
   & i% }1 y+ L- _+ ]! W0 o2 x$ s
5. * brief  EDMA3 Test Application
   - H' B6 y+ b7 @3 g0 g' \3 o
6. *
   
7. *   This file contains EDMA3 Test code.
   ( Q# b- C2 g7 j9 N
8. *
   / `# G8 v/ M8 Q
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
    # ]8 X6 L* [) y; X5 {
11. *         TO CHANGE.
    8 F, R5 Q6 x% E9 d  b3 y
12. *
    % t# m4 k& V) X& j1 U
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ' c5 P' ]/ t& ~# n
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. *
    6 b) N, t) P3 J/ J
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    - m3 F1 n$ b( g+ K0 i* v
20. * kind, whether express or implied; without even the implied warranty
    4 ~; @* _( O& z8 t/ C
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    $ w0 x& y; K3 f7 G
23. */
    
24. 
    / f1 S  R) V2 r# N; u# m$ f; [
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    3 z7 I9 ~* X  C! F" ?) M
29. #include <linux/interrupt.h>
    / S. f8 E9 f; B9 T
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    + q4 j) D0 B( p+ u6 z. e9 \
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ( {0 r) n' a/ T2 s. R1 Z! H
43. 
    * |  C( ^, Z' c2 C
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__)
    9 q3 z5 q: Y; Y/ W) k6 H' E5 U
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    / b7 M  i) H5 @  Y
50. #define DMA_FN_IN
    1 B# I9 u% [: `
51. #define DMA_FN_OUT
    8 A/ o" ~8 `5 S# H5 r8 e' e
52. #endif
    ' R, j- i% _' H7 p; h. U9 ^
53. 
    ' w0 b  _8 k8 X$ a: y3 j" R- L! O
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # k7 u# j- t. F# c
56. #define TCINTEN_SHIFT               20
    $ F# v/ h7 u" I: ^; p
57. #define ITCINTEN_SHIFT              21
    8 M% C3 b6 O( b$ B
58. #define TCCHEN_SHIFT                22
    : Q, A( M7 L0 h9 A4 i
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    : K/ j! v; R$ W9 F' R! v$ Z
62. static volatile int irqraised2 = 0;
    " a7 i% f. ^1 V0 F; a4 }& h
63. 
    - ]0 M+ }; g- j8 r1 w( }" v
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);
    1 \3 f; m3 L  B8 z- g! L2 A
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    # X. r! t2 J8 q9 c1 x* z
70. dma_addr_t dmaphysdest1 = 0;
    2 M: V( s( ]- S
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    0 u1 b. Q" Q7 q& m6 v. S4 {. e$ v# K
77. 
    " M" X7 y; l, [
78. static int acnt = 512;
    ! K" E; c. v% s" [
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    * N- ~# r$ c( i0 \
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    + f4 I% j' W4 w/ e4 c7 _
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
$ K2 u+ _  h1 t  t1 Parm-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。
$ [9 c3 B, v4 I  Q2 L. G! D5 p) ?     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
2 _! {: r; x9 K* Y( e$ G. o/ R* K( _

& j* ?0 @! u' u+ o. f' A