OMAPL138如何在Linux下使用EDMA3驱动

yyj

* Y8 l) S4 _. z' {+ L; [

1. [code]EDMA sample test application
   7 D3 ]- g, N* I- H* F* I. V
2. /*
   
3. * edma_test.c
   
4. *
   0 P2 n- V/ q$ o" `5 a, L& M; j
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ) ~, T/ s3 u: m
8. *
   9 {7 b4 q5 G7 }+ j" [! @
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
    & y0 i4 Z5 @1 T3 L0 a% Z
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    6 {6 T8 G7 |2 H7 @7 b
15. * This program is free software; you can redistribute it and/or
    + i( ]# d! m: d. l1 P8 \" ^
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ) o( f5 O6 y* X. c# F
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    / k8 j. K" C4 E" a. K# t
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    9 W$ j" I( u0 U7 R/ v) P
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ! U  p/ C. D& I$ ~7 f* L, J
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      Z/ y1 P" U  ^# D
29. #include <linux/interrupt.h>
    3 v0 ^0 j4 [* d
30. #include <asm/io.h>
    9 ^& m1 z! }/ I" p& _$ d  F
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    & Q! u- q7 V9 z4 D
33. #include <linux/mm.h>
    ) i! B7 }: B$ e0 y. S+ \
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    . E8 g  ]" R' _9 b0 T7 D% x
39. #include <asm/hardware/edma.h>
    * w" Q/ V; C3 a
40. 
    " C( g% m; Z5 U& h+ H
41. #undef EDMA3_DEBUG
    + S3 N1 V& C. T
42. /*#define EDMA3_DEBUG*/
    
43. 
    - a5 C5 k; b2 T+ C  u
44. #ifdef EDMA3_DEBUG
    ; C! _4 ]0 w6 H) Q
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    % \* V% B% @2 V- [; K
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
    5 V  {. i( \- V$ h6 D
49. #define DMA_PRINTK( x... )
    : b/ [7 N5 x0 F$ }" c
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    - D% q4 O* ~7 z
52. #endif
    % ?( U7 L) L5 k6 U3 z
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    " K2 k& {( J9 X1 a
57. #define ITCINTEN_SHIFT              21
    ! b" l. k$ T: p/ {. {0 r) H
58. #define TCCHEN_SHIFT                22
    6 F$ ~  |! A1 K: I
59. #define ITCCHEN_SHIFT               23
    
60. 
    8 r3 j) w; @$ m" m- h0 ^
61. static volatile int irqraised1 = 0;
    ! |8 y! E, D& b2 ]" q1 k
62. static volatile int irqraised2 = 0;
    
63. 
    3 X9 r5 k. G7 z- h
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % Z  D# y) v& B2 F
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);
    7 z% |! z& O& ^" `4 Z
67. 
    & D: {+ N. m6 ^
68. dma_addr_t dmaphyssrc1 = 0;
    2 Z; D# F+ d. a
69. dma_addr_t dmaphyssrc2 = 0;
    0 o. ^$ ?7 `0 i1 v+ d
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    $ Q: [2 w' \0 t
73. char *dmabufsrc1 = NULL;
    . o$ J1 S6 v' W9 Z5 R
74. char *dmabufsrc2 = NULL;
    3 g- d/ ]: G9 {4 S
75. char *dmabufdest1 = NULL;
    4 o2 s* Z! z. H3 F* q1 ^8 q
76. char *dmabufdest2 = NULL;
    
77. 
    1 i7 G/ q/ F" f6 K7 K
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' @- _$ ?, I( G
80. static int ccnt = 8;
    
81. 
    7 X1 ]- e( m3 x0 I# a( A
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

      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
arm-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。
; L  y% r  C# N% D