OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   . Q/ @3 M: T7 }% x2 Q) \
3. * edma_test.c
   
4. *
   5 f  l: o# Y1 R& C& ]7 i8 ~
5. * brief  EDMA3 Test Application
   
6. *
   4 Y/ J# n! l0 E% S: a
7. *   This file contains EDMA3 Test code.
   
8. *
   8 R" r$ d* m) Q4 [' ~' a9 M2 w
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & X  I+ R# B8 E9 S# V9 C
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    8 U, N+ c. y6 K9 T* |9 I" [% d
11. *         TO CHANGE.
    ) I2 b9 g7 J7 \# _, P
12. *
    1 q: r. s) W/ J* ~$ V" a6 \
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
    
17. * published by the Free Software Foundation version 2.
    5 ?3 T4 K. `( ^/ W7 g, K9 {- N
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ) c0 b8 L/ W: V& a0 ]
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    3 s6 D8 o, v4 H* Y- `
24. 
    9 i8 A9 }! Y' t) y1 ?
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    0 j' U: s$ D1 }" S
27. #include <linux/errno.h>
    $ E6 S8 Q' \3 H6 \4 I% z0 @* m
28. #include <linux/types.h>
    5 E# x7 N) o/ ^. S
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    : ~, k; P5 n9 M& f8 n8 G) q+ d; H
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    * P6 r8 J. k# K1 I2 S
37. #include <mach/hardware.h>
    6 H! ], ^6 K, _; _
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    " t# @. F; s& o) V
40. 
    , f( p6 [, D; c. \( M
41. #undef EDMA3_DEBUG
    ' ^0 L: W& f+ B, A8 r% D2 I+ S
42. /*#define EDMA3_DEBUG*/
    
43. 
    , j2 F/ ?$ m. X' V& ~
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    5 i4 z4 ^  h4 K5 t  f6 G
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    : C5 D% L% L% l, A. q% V6 `3 q, Y
51. #define DMA_FN_OUT
    ' o% t- @' N* O
52. #endif
    
53. 
    # a" y4 F7 n' \
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ; f" O9 ?9 h9 N3 ?
57. #define ITCINTEN_SHIFT              21
    8 T/ G# d8 V: V, A
58. #define TCCHEN_SHIFT                22
    + C1 m9 [" T7 k: j1 K9 L/ P& P9 ?
59. #define ITCCHEN_SHIFT               23
    # a  V' e1 r, Q. K, K
60. 
    - H/ r# y4 l% O( K
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    9 @: i3 P6 f4 Y+ q8 h( D. W  N" m/ A
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. 
    8 ~9 w; V" {# z$ |* W5 K6 y
68. dma_addr_t dmaphyssrc1 = 0;
    8 Q( I9 ~8 V# `) f+ L. C3 ?
69. dma_addr_t dmaphyssrc2 = 0;
      S$ ~6 O# G" {# ?* U6 ^# u
70. dma_addr_t dmaphysdest1 = 0;
    - }6 ]' ?  J! B* o  u! T' }- e
71. dma_addr_t dmaphysdest2 = 0;
    $ e1 C  n) E8 B! E5 ?
72. 
    2 B$ ]) A- Z0 e; K1 o1 P  \( `* {
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : V! p3 L( F4 l- o- H
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    - z+ l# t; d/ X$ {4 z8 H
79. static int bcnt = 8;
    ! A$ G2 {4 {7 |! N) x5 V! h6 w; W' d% x
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
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
* w$ `6 T7 a( M. d0 J! yarm-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。
7 d& G% F& m5 s     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


& ?1 B+ `8 H5 C( E# d