OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 @5 _) m! e3 G

1. [code]EDMA sample test application
   # s6 w4 S" |6 c- J
2. /*
   9 g/ D- x( \# x7 d# Y3 {# V$ ?! D; S
3. * edma_test.c
   6 u+ M% @& V8 ]- y
4. *
   
5. * brief  EDMA3 Test Application
   0 ~3 A7 j7 U. f1 E
6. *
   : I9 C* R5 D' i! J  }6 c* _! o" B
7. *   This file contains EDMA3 Test code.
   
8. *
   - K/ k; `, h9 K  \3 F
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! e+ h4 e. t# T, O. P. _
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    7 n1 a* k4 ^; h+ s
15. * This program is free software; you can redistribute it and/or
      C7 ~2 b- @& v: Z
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ( |6 r1 r; @% l8 o! E5 ]- j
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
    * K+ o4 x- S8 T$ x
22. * GNU General Public License for more details.
    
23. */
    9 Y- T0 ^2 T6 E
24. 
    % Y0 D. ^0 j- R2 z9 w6 L
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    4 S! |* @, v2 S. a: K
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    % A# g8 c' ^2 [5 z6 ~
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ( M& Y$ _" ~! s- H7 [- i
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ) q1 Q5 |% K# y) g9 w! K
36. #include <mach/memory.h>
      o8 O/ A. c4 a
37. #include <mach/hardware.h>
    6 }3 H' C# @& d2 r
38. #include <mach/irqs.h>
    0 e+ c+ T1 v0 F9 ^
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    1 S7 k5 }: ]5 W. ]2 X8 |. f3 r
43. 
    / C) W) A% X+ P0 z
44. #ifdef EDMA3_DEBUG
    $ l  q3 o7 D9 R( h6 C7 b7 P" q
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 Y6 X  L0 f9 E- T% ]/ F% j7 b
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    4 T6 m( ]* C$ H4 K. Q# O3 L
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    3 ~* |1 J+ o0 J% R2 f: _# ?6 p
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    * [& W8 {( z0 p+ v& S6 X
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    0 J3 [  A: z5 t. ~1 U
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    / K9 X% }: f6 c1 ~; h
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    8 c3 Y( l+ I4 |5 r3 X7 h, M; d# k3 @
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , V1 x" A: y1 [+ A
63. 
    8 ~' W8 c( l7 _% f0 @& R2 h
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! n2 s* u6 I2 {, ]  h% A# {$ C* J
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);
    % B# f+ Y0 Z  S5 ~# J6 D% q9 @
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    + @- B3 M9 e2 t8 w; u% S( U# b
70. dma_addr_t dmaphysdest1 = 0;
    0 t' X' Q( q0 V( l# ^! y  }
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    & }: h# h# e' T6 T, f
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    1 n3 B& j* P8 ?4 z6 I: B4 V( u
76. char *dmabufdest2 = NULL;
    
77. 
    . y( Q" T4 N6 D
78. static int acnt = 512;
    
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

( ~7 W6 j6 I! h- o: l; I- [
      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
: @  ]1 T  u3 X% v0 Y8 G' Rarm-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。
: e: I5 r- ~9 ?: |

6 ]- s- s0 J2 D- o3 U: F