OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   3 W! p! r0 b0 I, m6 {) F$ ]2 L
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   4 Y' N9 {) H3 B" d1 R/ F' c
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    " A4 {2 S5 V. M5 P
11. *         TO CHANGE.
    8 l# G1 K: ?- c; C: ^( Y
12. *
    & i7 T. X$ b4 o% s, x1 E
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; v3 K: R% m( x7 U- r7 o
14. *
    * x% X+ t7 u/ @5 i6 \
15. * This program is free software; you can redistribute it and/or
    # L9 }9 x' I# R/ |5 [
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    : w6 \' \5 b7 ]5 f8 K5 q: U
18. *
    . L- v+ n6 Z  p, O" ~/ f
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    7 r/ G, `9 B' a% F3 R7 ~- }
20. * kind, whether express or implied; without even the implied warranty
    2 U5 P& v3 h- h1 x- g, C# ^" Z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - h" t  o! l; M% Z$ c
22. * GNU General Public License for more details.
    . O$ I0 D% `8 v
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    2 X2 H: I* w3 y# r1 v9 I  o0 ]$ y5 t1 d
28. #include <linux/types.h>
      d3 v0 |6 z' X' y, R: o' H& j
29. #include <linux/interrupt.h>
    2 H& r: ^: h) y9 a* I; t: a  d
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    1 J5 s' X$ J6 F/ G
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    9 c" a. ^4 |; p& g, T
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    2 p& u: u% X9 I
39. #include <asm/hardware/edma.h>
    + q( ]7 `0 b6 N
40. 
    * e9 r- f3 a! m  B3 {
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    " p  v- Y1 k$ d
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__)
    . ?' ?  F" X+ R- d1 Z2 o* B, y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    . E  c3 G' K2 a+ j4 ?  s" d
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    * J  t$ o- W! W$ u: `
52. #endif
    3 p! @/ t) f, D) p0 P$ \- r# N
53. 
    - B* ?$ h0 @0 i
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 `6 S; c0 G8 a* D0 R
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
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);
    4 I' b' v; q+ _7 k1 z. H
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % g9 r* q" t" A9 j' N5 f+ J# E
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    : f( z, s/ w6 A9 \( W
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    * L" U0 N4 a; @$ a5 m8 c5 @, q
72. 
    
73. char *dmabufsrc1 = NULL;
    8 D: G( z) d  R1 M( D: a8 x8 V
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ' i, O) V* T! l  o$ S
76. char *dmabufdest2 = NULL;
    
77. 
    . ]# M3 G4 L# S/ D  y$ j
78. static int acnt = 512;
    0 ]+ a- y) i: ~7 O) H
79. static int bcnt = 8;
    2 Z  N( }8 E0 I6 _/ J6 @$ s" s
80. static int ccnt = 8;
    ' X2 V  \: R3 f6 ~
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ; J' o2 O2 m# R6 T: S+ ^2 Y
83. module_param(bcnt, int, S_IRUGO);
    % _# z, c, m$ G2 M2 O6 [8 s
84. module_param(ccnt, int, S_IRUGO);

复制代码

# e  f) Q* g5 ^- d      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
8 h6 @5 p# n# O+ q2 o: [3 O  E) varm-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。
4 Y; F1 V$ L$ j     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
8 B" d5 Q4 J% @# Y! V' F2 F
  Y, e# k; o- h6 h2 y' [