OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 F4 u8 A6 [2 d

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   ' s& l# R3 ]: j5 S
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ; O0 J+ [9 f3 ]/ ]& {  h
7. *   This file contains EDMA3 Test code.
   ! {* J2 Q. M$ ^) }  ?
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
    
11. *         TO CHANGE.
    
12. *
    4 ~5 x$ R7 L2 {& |+ ^+ s; G
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    : I5 }5 V- T5 v. V  x- ^* ?2 K
15. * This program is free software; you can redistribute it and/or
    % T- A6 B; {4 ]9 D4 t6 ]- ?% Q
16. * modify it under the terms of the GNU General Public License as
      X1 M% o( t3 u, @1 Y6 e% }( h7 T- L
17. * published by the Free Software Foundation version 2.
    
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
    + `4 K4 ~4 z; Q* I& e
22. * GNU General Public License for more details.
    
23. */
    * H/ L1 j$ ^  Y. a3 f
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , c! H, {: t8 \* `0 J5 |
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      b9 Q; m8 h7 ?
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    6 S; j! O0 ?9 v" R! c
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    . r$ C5 F2 K, K( o! i* z6 D
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 h. A  T( z4 I. j& `0 W
39. #include <asm/hardware/edma.h>
    ' @* y: D; p4 C, ]8 _. }/ P7 u
40. 
    
41. #undef EDMA3_DEBUG
    # I" M+ X! Y$ F* \$ L
42. /*#define EDMA3_DEBUG*/
    
43. 
    ( G2 J5 z: Q( e. }* ^! B+ j4 x1 p
44. #ifdef EDMA3_DEBUG
    . s" C  U# c4 [( Y
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
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 g" _, z7 X$ C) C5 N8 S
52. #endif
    5 i! z( J+ C% G( z5 f9 k2 j! S
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 [* v9 \, s: c7 T8 D: Z
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    % b. {* F! H1 J4 n; ~. ?. d
57. #define ITCINTEN_SHIFT              21
    ) B" r% ~$ X( |- N6 ?
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    . z0 N" ]/ f& k# V1 u
61. static volatile int irqraised1 = 0;
    8 J, @7 q) ^9 L7 v' R) X0 Z" b
62. static volatile int irqraised2 = 0;
      Q& ^  G+ d5 X2 Y! _
63. 
    
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);
    % j( V9 o5 ^( l  A1 F3 G8 S
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
      q6 j2 ?' Q( S$ b% W/ m
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    , V: B6 F9 O* `) o6 \; s* }% T
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . E* b4 E" F- I# ^2 g  u* y
73. char *dmabufsrc1 = NULL;
    : J) }/ P6 b0 H" }: {
74. char *dmabufsrc2 = NULL;
    0 p9 {$ d; ^* h$ j8 A* f( ~
75. char *dmabufdest1 = NULL;
    - }( h2 [2 }! f: z7 V- ?
76. char *dmabufdest2 = NULL;
    * D1 H" A  H! l+ @5 t; o- V# F
77. 
    1 \/ ]% w0 E! H2 U4 g7 e- b
78. static int acnt = 512;
    2 C/ m0 W& A2 H9 w. B3 w: A
79. static int bcnt = 8;
    4 i' |6 q- G) M' }$ P0 W6 D
80. static int ccnt = 8;
    
81. 
    # {  b9 ~; ]% D# z! Y
82. module_param(acnt, int, S_IRUGO);
    : k% M  w: O  p+ f+ A. M9 u
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

( p/ n6 n/ j( o, W      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
# h! Y& Z  r( {; q$ D# d3 e9 Qarm-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。
! Q2 |5 u4 M' M' y7 |- O  @