OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   / c! E* N) ~6 T  {/ e
3. * edma_test.c
   0 y5 U+ o1 K3 y$ a
4. *
   0 X/ M$ _9 P( p2 ~
5. * brief  EDMA3 Test Application
   
6. *
   5 B6 v6 u9 {% i" e3 g1 @
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' I% l( R. H& Y" M7 U5 r% |- `) [0 q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * v+ c  x8 F: x! Y8 N3 S% F
15. * This program is free software; you can redistribute it and/or
    ' s3 k' I& a, ~' n
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    # F# S) r8 b, t! ^
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 Y! |4 c" Q* w% v( s. N  T. Y1 a- N
20. * kind, whether express or implied; without even the implied warranty
    7 x( D& P" Q- ~8 _6 g$ ^
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    9 [. i  [0 V- o* O+ \% X  n+ B
23. */
    
24. 
    $ N$ L9 E' D0 `, T; u* \
25. #include <linux/module.h>
    " H% {: }( `% t
26. #include <linux/init.h>
    3 J  X4 x/ l0 N% a0 C$ J' H) w5 m
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    * ~$ v. s8 A9 y  _5 w$ v6 j: U( }
29. #include <linux/interrupt.h>
    , ?6 T6 |1 K" u/ v4 Q& y5 Q# s, P
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    % y  ^. \$ y$ `  t* X* s
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    . x4 J9 ]4 z: N8 r0 \* [- D" r3 `
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    7 U) K6 e2 I( j
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    - w* ]. L2 m! l% j7 D9 V! m+ E+ l
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    3 c; J) C7 J$ k# R# Z
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 |: ^3 g7 r7 g% j( \: U
48. #else
    
49. #define DMA_PRINTK( x... )
    9 g5 }- r. n4 s  l# t" g  B
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    2 j# g/ a7 h% h) ~# }) `
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    9 Y" X; E" C. b: ?( G2 ]
56. #define TCINTEN_SHIFT               20
    " y* G/ R- i3 k
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    " B0 {" V1 n3 c8 }6 a- p, L0 r
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    0 r( c. w% d  W1 M/ p% Y
63. 
    $ A: e- p* {8 _, ^4 _( Q( {
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);
    $ S1 i) v- L2 d9 C
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & e% x- j% q2 {/ N0 T. r  G
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    8 A) ~# T4 x( _  H
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    # e$ {' T0 u" y9 y. w+ p3 X
73. char *dmabufsrc1 = NULL;
    , w4 U9 v& l& h. U
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    6 L$ b0 k: ~7 H0 t
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    1 F; ]. y3 x4 u6 i& _& Q
80. static int ccnt = 8;
    
81. 
    + F* w8 F- O, K4 f6 L/ F
82. module_param(acnt, int, S_IRUGO);
    + b# L3 `. Z6 L9 B: v- J
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

- {! t+ p, t: G/ ]( d5 ?      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。
' L, y& X. ~& S  @+ ?% d9 G/ g     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
+ s% ]+ P0 Z/ j  ?4 Q2 x* \2 C
, z4 r+ M  ^, t. N; \% m7 F
9 q& Y' V# k+ N( X0 }1 |, ]: `" A