OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   5 U9 V. o1 Y# r( [# M
3. * edma_test.c
   ; W. w2 J+ b/ n# ]5 r
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   # V5 D, ~: ~) B2 [9 ^# o- K/ b
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   " R/ `/ f+ T0 e' J8 p6 ~9 z& i/ w
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ! z0 ?+ {: g$ a2 g& O9 B$ M
11. *         TO CHANGE.
    
12. *
    & L: _+ Z( n! g" L# G& d3 v; f
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    * Z$ I8 W9 c4 r0 O% A1 L1 o
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
    : S# A' L" c2 Q2 o0 S) ]: W
17. * published by the Free Software Foundation version 2.
    
18. *
    & S  ]. _! G4 U: u! Q* [  E
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      |, M# t! D; n) C# s) I( Q, w' o3 h
20. * kind, whether express or implied; without even the implied warranty
    9 J+ a0 F5 @+ L( w" Q2 [# g& g6 Z4 h
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ) x0 _: P; k2 a3 Y5 ]5 W
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    # d* E1 k" ^( }" S7 S2 h
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    5 G' S( u8 c1 z5 q' ^9 Z: X9 q
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    1 A" [( a" d' c: G# b  `4 J' e) i
34. #include <linux/dma-mapping.h>
    , j4 M9 ^  y; C- J' B9 X
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    6 _/ z, I# [% e" Z
38. #include <mach/irqs.h>
    ( c) x8 ~. z, N0 d7 H
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    . ~; f# A/ V$ q$ Z
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__)
    ( A; g2 Q3 p; D' j+ q
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    ( W" L5 \* K" {: K' f
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 i$ x8 A3 h& {1 `
52. #endif
    
53. 
    ' ^" j6 b8 U0 O1 ]& d5 h$ s) w
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 |& ^5 P$ `! H6 {9 @
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' P# V2 e* C! Y3 n
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    # r2 u+ i* F0 Y
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    1 N7 L/ K6 ~3 s. g' I
63. 
    + D  K; z4 Y. t. t6 a8 c7 u( a) H- u
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 @" u. g- q9 c9 f
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * A$ K( i! M$ l1 L7 n( J
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 A) C/ B* U! m4 A
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ; i- Q5 o; E+ w: s( H
74. char *dmabufsrc2 = NULL;
    # g6 A- C5 D$ }7 O
75. char *dmabufdest1 = NULL;
    $ y7 y. C( _  H
76. char *dmabufdest2 = NULL;
    8 [( q: x  Y0 b9 ]2 `+ H
77. 
    
78. static int acnt = 512;
    5 D3 [  {* M+ @) p8 D; }
79. static int bcnt = 8;
    
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

( K$ h7 ~" d& D  M5 H3 v7 D
3 i# v7 S/ z( b      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
  n# G  u- q8 m4 q$ d+ marm-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。
; C* k, @( ~! W& u     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" g; p- E8 b! {  k

* o; f# @) _  Q