OMAPL138如何在Linux下使用EDMA3驱动

yyj

7 P' V1 R: M5 c  u9 K. X8 v

1. [code]EDMA sample test application
   9 x( a/ T( M5 L; Z; ~
2. /*
   
3. * edma_test.c
   
4. *
   ; {. M3 X( ]5 e1 D* D* @- u+ g
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
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) Z" H2 `' I. O
11. *         TO CHANGE.
    9 o1 M' v, a3 B+ I1 p
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ z2 ]+ C( X! a% g
14. *
    
15. * This program is free software; you can redistribute it and/or
    - R  i/ L& V) l& w; X
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    * f& F- p* U, ^5 l3 ]
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * j$ j* ?" X- D( M; n
20. * kind, whether express or implied; without even the implied warranty
    7 ?) u8 x: B( K( W. Q  `+ o0 n
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . }1 u' ^1 E3 c/ U, R
22. * GNU General Public License for more details.
    
23. */
    # E1 c* G9 o2 [
24. 
    
25. #include <linux/module.h>
    4 B  }+ m- @( x" _+ c
26. #include <linux/init.h>
    6 A6 _; P: P* t" r8 l2 W
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
      U( ]/ b# j: V- p/ i6 f# E
31. #include <linux/moduleparam.h>
    9 ?3 F. h/ N, M% J3 z- `
32. #include <linux/sysctl.h>
    6 o; X% s+ R4 y3 }& p- Z
33. #include <linux/mm.h>
    / a& y5 r5 V! W: V+ ^; ?
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 c8 C' y$ G# _% S2 Z/ c# v3 \$ N/ X( o
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    . \3 }4 d/ T# C8 w# |) }
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    7 e9 y% q0 }' C) h
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    8 o5 H4 O, n7 h9 y
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      \/ R8 U9 F, }2 Q8 I$ J  I. A. G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' L  r! T4 H" R9 t; ]
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    + s/ k0 E0 J6 T" G9 ]7 l, u4 b
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    1 `' q7 ?+ u  {1 p! z6 @
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ C# N# |: n' V1 d9 {! x
55. #define STATIC_SHIFT                3
    ' Z6 D: B& q% e' I1 Q3 L; c# L$ Q
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    % V3 I0 a$ u! k( A# Q! W% o
58. #define TCCHEN_SHIFT                22
    , ~! P' E7 ]0 X) b' w$ H5 A
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    0 }3 j% _/ A' W0 |% ^
63. 
    8 I3 O9 [1 I! s. V, e6 s! L
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);
    + Y# z5 ]' C# _
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 D. C+ H, y  y4 K' N( p
67. 
    8 C0 @+ C3 O6 Q9 {
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    , @% Z; c7 @. ~* c
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    / K# _! m! z! a/ Y
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    - F+ n% V- c. b6 ]1 T
75. char *dmabufdest1 = NULL;
    ' E& B% R0 ^( i; W
76. char *dmabufdest2 = NULL;
    7 x) I8 z0 _+ E) _1 u! C0 s: R' K& ~
77. 
    1 j5 w( }" Z4 V% v) w2 k
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : b. H+ d2 _0 R5 r% y2 f# y
80. static int ccnt = 8;
    2 t: p: U5 B) }
81. 
    
82. module_param(acnt, int, S_IRUGO);
    2 ]! n# f& E' M1 G
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 ~. T4 A! j6 m0 [* V! L# W
8 d6 g9 v+ A# v, t- ^' H9 j' |1 ~$ _      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
3 U8 ~, Y: W# 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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

( F( q6 ~6 N+ [( a' B% F
: w- z2 w+ Y2 u2 q. O5 Y# E/ u