OMAPL138如何在Linux下使用EDMA3驱动

yyj

; l* M' C  i; Q& T# B. r7 e  o

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   0 D6 s/ _- L- E& I6 q) V' \( x$ z
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ; ?  N/ p8 |* P0 S+ V, _
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 c+ `/ i9 m3 L* N8 Q3 q+ v1 A! N
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    - [6 ~( L  @2 s' W% E  {
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 I4 A* A) @# k' ]# j
14. *
    3 ^. T/ x2 U0 M' X5 z# n
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.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 I* o: d, Y: p
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . b% W9 A7 R' V* l3 d
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    ; s0 a8 j% _1 W  j
26. #include <linux/init.h>
    ! c6 S" P9 a: k/ J9 v# O6 F9 `
27. #include <linux/errno.h>
      [4 @; C6 ]  O' [7 J$ D
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    7 b- o0 x: W& h
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    , t6 W) \; h% T% v
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    6 t1 s9 w8 ]( e; y7 a
35. 
    
36. #include <mach/memory.h>
    1 M: c/ z3 E+ X( B" [1 q4 G
37. #include <mach/hardware.h>
    7 @) Q: Q! P% ?0 y- `/ j( R
38. #include <mach/irqs.h>
    5 K8 v5 u2 B' q" M; t! v  w
39. #include <asm/hardware/edma.h>
    
40. 
    + `# c8 Z: S& g8 ?0 W/ \) n  F
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ( t" }" D: J9 J5 D' R' o
43. 
    + D, O- M1 e3 _% d' j9 I& r
44. #ifdef EDMA3_DEBUG
    4 B5 s, \; [6 T+ l* f. L& |4 e
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % X( \% y1 A3 q2 n! Y; d# K# L
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    / N5 j5 b6 Y: b: Y
48. #else
    
49. #define DMA_PRINTK( x... )
    . I) l7 o: N( J$ c& w/ p( B3 K
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    , j/ {4 G3 i; D2 F8 C
52. #endif
    ' u$ H$ {7 v; e* Z6 F* _
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 Q( j' c/ z7 w0 [$ J8 X
55. #define STATIC_SHIFT                3
    7 }& i) U% T* O% d+ ?( `- [
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 i& S& Z! E: ?$ @! V
60. 
    
61. static volatile int irqraised1 = 0;
    % V8 }9 o# x0 w' O- G
62. static volatile int irqraised2 = 0;
    
63. 
    2 _9 v7 W# J$ _* g/ Q0 G. _% w
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( L0 @) e3 Y: T% _+ f7 o& ~& j
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " ~  }, g# W2 D
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + }: C  @! n7 ~" E" _+ o! `$ b0 E
67. 
    6 u, F& D& }6 {2 m) V  H: G
68. dma_addr_t dmaphyssrc1 = 0;
    + e. l% J( A2 K8 b8 d% L8 i
69. dma_addr_t dmaphyssrc2 = 0;
    $ }4 ^6 a( t9 X/ n7 Y5 T
70. dma_addr_t dmaphysdest1 = 0;
    & R0 @# e- O$ ~1 v& E
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ! B& d3 o0 z- l" @: A
73. char *dmabufsrc1 = NULL;
    ; v5 G9 m  Z7 C( y3 w5 b
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ; X3 i; e9 ?7 y" b$ T
76. char *dmabufdest2 = NULL;
    
77. 
    . Z2 @4 e9 y+ ]* D+ G; V
78. static int acnt = 512;
    & ?& l8 B- A4 Q# C, i
79. static int bcnt = 8;
    - R  k4 N: J' g) }
80. static int ccnt = 8;
    8 }: \1 {# V. r8 D2 P9 k
81. 
    1 p# H" v8 \! H& @0 v5 m
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

. K4 g! z6 }1 X/ q" J
      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
7 K% g! F( u% H/ z: Narm-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。
0 ?4 F2 S' [( t: I% E
0 [$ {- \" C8 \3 p0 ]- F* o