OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
     o' s, x7 f( _2 ]5 `
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   - \, ]( u# {0 B& D# S
6. *
   2 Q& A) e! k: e8 }8 C& J$ q2 [6 Q
7. *   This file contains EDMA3 Test code.
   * \9 V1 V% {$ z4 p
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! h# |. ~' b, C7 W! `
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/
    / r. h( n0 m' |
14. *
    . J4 `; A5 @4 \
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. *
    ! v1 k1 J/ k9 a! m' P, ~
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
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    : d- A0 k; {6 O$ x# Q
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    , h1 R+ V' Y5 C9 M: f
28. #include <linux/types.h>
    " {* M0 ?2 ]0 {+ F/ b
29. #include <linux/interrupt.h>
    7 J  A8 N# Z* Z' U
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ; Y( d; ?$ Z7 m
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    : K# n$ i/ [5 |1 c; z- B
35. 
    . ?; [$ i* L8 U: Q
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    + {' u8 ^( \- ]5 Z: N" P& b& N" }9 x0 Q
38. #include <mach/irqs.h>
    " |& A$ f6 Y1 H# P
39. #include <asm/hardware/edma.h>
    6 W5 J0 ]" u3 S" r7 q1 b
40. 
    
41. #undef EDMA3_DEBUG
    ( L7 Z- a- |$ b6 A7 E! \0 B. D
42. /*#define EDMA3_DEBUG*/
    ( |4 S) F5 R' j3 Y
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! C# {- ^; a2 M
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    9 P% Q; m/ h9 I7 f
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , V+ C' H2 R9 p& o& E8 |1 l- B
48. #else
    1 r/ X* ^- j8 L- g" b* o% i- v
49. #define DMA_PRINTK( x... )
    ' U$ D$ q; m! B, @! U6 H
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ' g* N0 S8 U2 \* v3 j# {% N
52. #endif
    9 b' C% `4 ?7 X4 P: v8 E2 Y
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    + H) A$ d+ A' W: E7 \7 r; _% o
56. #define TCINTEN_SHIFT               20
      X0 Z3 O! E6 a8 {4 i- Q" a
57. #define ITCINTEN_SHIFT              21
    + E: n; s! u' Q+ Y) ~. H
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
      |9 U6 a: Q# e# |: E4 @+ d
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % U, O% a2 k: J: X1 I
67. 
    " K- T2 \4 d$ M' X" p8 W8 _( o, O+ e
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 f2 {: i0 J1 t
70. dma_addr_t dmaphysdest1 = 0;
    6 F1 x4 S3 Z' D  y1 n% P7 O
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    0 X! a, G1 ~1 i  h: [. @* k5 t
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ' |+ y5 Z- d* W# z
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ' W# q+ S$ [! ?+ j" q7 _
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    + G/ D4 F2 I* J, Y) Y. q
81. 
    ) H( t$ p) `: v
82. module_param(acnt, int, S_IRUGO);
    ( T/ [' B( \2 U) H' d/ r4 p# G
83. module_param(bcnt, int, S_IRUGO);
    8 i( y% s& \7 Q9 M2 A' W
84. module_param(ccnt, int, S_IRUGO);

复制代码

" F8 `( `4 T& y5 ?$ b7 M7 d
# _; C( _( q3 J3 r/ G$ ~+ t9 `      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
6 h# S+ R) l2 N4 P, g0 garm-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。
$ v* G6 L, j8 m. ~) G
/ z4 E9 E. \; G' s5 I