OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   & P) V/ v( I. m* ]9 P6 [
3. * edma_test.c
   ) `7 y. I5 M1 V6 j1 W7 g$ y
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   8 x' ?4 A7 A: X5 ~4 B. N5 ?
7. *   This file contains EDMA3 Test code.
   
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
    4 E0 O4 O; k% ^' {" y' A4 n
11. *         TO CHANGE.
    0 p8 m8 q) L8 O# G$ c( \8 n9 _
12. *
    & Z+ B3 m) N/ J: H5 }; T6 J7 n
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " E+ e! C& ?6 V6 p
14. *
    1 ~! o- y0 F- |: R7 \
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. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * X% T, \! c. A( {1 U  ^
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # u( t( `  z% m7 K$ f& S
22. * GNU General Public License for more details.
    
23. */
    
24. 
    3 O4 M5 Y/ i* C! a; c
25. #include <linux/module.h>
    ( r1 |1 J, ]2 r% D" f! j: P. o
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    , T% E! R5 q2 E* B
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    3 {9 K1 F* }: P& ~. @% R
33. #include <linux/mm.h>
    % n* @) W. U- p+ ^# J5 p+ a: p0 v
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>
    * ^6 y/ @6 r3 B* c9 K* z9 B2 s
40. 
    
41. #undef EDMA3_DEBUG
    - j+ D5 u& G5 a9 f( A! R/ H7 d
42. /*#define EDMA3_DEBUG*/
    
43. 
    . x6 T" h' i* [3 N
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    : W- z5 N2 H. D
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      O; K. ^, |" o! y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    * l- Z8 j/ |. b' u7 ?5 Y
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    4 x3 W/ `4 q# A1 ]9 ]; x
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    1 H0 ]9 l1 a; L( x1 X' s
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ! v2 ]' S9 Q' L" b0 A: s, e4 l+ H
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
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. 
    / G% w- u+ X2 _" r/ {4 O
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    " N+ b4 X$ H. L+ w7 }: A
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    0 p0 V/ E4 W3 |: `% s. `7 I, {
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      ~2 c; ]" M. N  B  a; J+ x
76. char *dmabufdest2 = NULL;
    
77. 
    7 @+ R) g; W4 w
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ( _0 P7 d/ i. k$ y0 K
82. module_param(acnt, int, S_IRUGO);
    * u$ U0 E# v( c/ {+ M0 }
83. module_param(bcnt, int, S_IRUGO);
    7 L3 e- W9 U* z! S& w; G
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
, ~0 _* @) ], X0 Y" ]5 h4 xarm-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。
5 I2 \6 F9 [. @+ {: i4 X$ W
2 v/ [+ k8 R" t
  ?* l. E& u/ W( X