OMAPL138如何在Linux下使用EDMA3驱动

yyj

, W( J6 z8 v/ u3 f5 B- C

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   5 j0 E; B$ f: o
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   8 h: z9 Q, V0 a+ c" _. M' N
8. *
   : A/ W$ W4 {- L" O7 l4 U7 k3 v
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 y1 c! `9 X- {5 c# N+ y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    4 s+ o2 M" _! y  N$ r& u
11. *         TO CHANGE.
    
12. *
    ) Q1 {; e& n5 e2 O# d
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ' W% \5 Q7 |( o; G; k
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    # i5 z, Z- U, s8 Q: q0 l+ c& u
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    $ w" U- U  t$ O
22. * GNU General Public License for more details.
    + C& l7 S9 E( j: h+ I- _1 L" I
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " w$ D1 a6 e3 \4 ]; F5 v
27. #include <linux/errno.h>
    8 @. Z' r- Y$ c. X2 n# t  k% n! u
28. #include <linux/types.h>
    ) Z& P) a$ l  @! \7 W* M( a; l
29. #include <linux/interrupt.h>
    # I4 S4 q3 _8 @$ j# G, r
30. #include <asm/io.h>
    : q! t6 t$ [5 n' P; d0 e
31. #include <linux/moduleparam.h>
    / G1 L! Z4 G9 l& |- f( p
32. #include <linux/sysctl.h>
    4 k9 }5 {1 G( Y& B% z+ t- p
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    : L$ I: Y$ p1 J7 K. q
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ) e' B& \! V+ ?) Q5 W/ U( U
39. #include <asm/hardware/edma.h>
    # b- g4 t6 B1 U: y; t; U' K
40. 
    # x+ c5 m0 x6 l2 _2 [' o4 ^6 R
41. #undef EDMA3_DEBUG
    & o6 K, u/ j  O' ?. V- s
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ! }6 f" a: _# I* {3 b
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__)
    
48. #else
    / ~3 T& O8 i0 Z
49. #define DMA_PRINTK( x... )
    ' f- l! Z! ]! d6 [7 ~3 ~+ w2 O+ n8 E0 L; v
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
      t9 F6 s& y7 |+ q$ T" u
52. #endif
    ( _4 v7 m2 W( K; v* q( b' O
53. 
    9 c+ h# t$ [0 k  ~$ P. o
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    9 @( F' j8 ]- b; j8 a. d3 @' e
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    3 s8 x) _, F$ {9 Q
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    + T4 O) n; Q' l7 s* e4 h
62. static volatile int irqraised2 = 0;
    + v! ~4 s, h# @% r! V  ~# y
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 T9 Z. W2 E4 I' V$ M
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. 
    : f2 a$ u6 [+ L/ p6 _, g( m7 @
68. dma_addr_t dmaphyssrc1 = 0;
    & @* s! d  @0 v7 f8 V! f
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    6 {/ d. i' |, U8 A1 ?! j3 M- K
71. dma_addr_t dmaphysdest2 = 0;
    , L/ d( x3 v3 s- l2 a8 W2 b
72. 
    ! {; `* t; ]& O# \4 c
73. char *dmabufsrc1 = NULL;
    : W% o5 V/ f) [0 g8 l# X
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    4 U4 F2 G+ X! r9 b
80. static int ccnt = 8;
    " m" u7 s' H" Z. D1 a- `3 w- J
81. 
    4 K9 W& Y2 Z0 M
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    9 J! x6 }7 k' ~4 a* J4 V
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 H. V. Q* ~2 j0 P$ Q& ]" i
0 a8 X% Y! n% m0 X      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
: F4 ]# Z- N2 t7 _. @2 I) Oarm-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。
* W! @! R. ^9 F2 h, w: N     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 w2 }' F% r! w& r* q( s  ~3 |
3 E! Q8 n, \0 X8 Z$ q% t; u" r