OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ J6 ~) D0 u2 p" q

1. [code]EDMA sample test application
   ! a- T+ u3 F' F' a: Y5 r
2. /*
   
3. * edma_test.c
   . L& u8 \% R6 v: H+ [
4. *
   
5. * brief  EDMA3 Test Application
   0 K+ l3 c5 W. M. J  c& x
6. *
   9 j2 j' \: @( i; p
7. *   This file contains EDMA3 Test code.
   # ]* E# @: a4 c2 E+ ^# l
8. *
   % Z1 ~# c5 E8 Z; h; {. D
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
    7 N5 @1 f" Q8 D, p' j; L
11. *         TO CHANGE.
    - j7 E& f! A/ o0 u1 ]
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + W/ O5 }1 y/ l7 D: {" C
14. *
    1 k( K. c" ?, T3 k1 W
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.
    0 o! ?: s$ I, {9 p9 p: X) F
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
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 ^+ p1 X. O+ M& n5 u- T
27. #include <linux/errno.h>
    7 z4 M* J: a. l9 L- z
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
      r/ p/ `. l; p" V: }0 ~* G  I* a- a
31. #include <linux/moduleparam.h>
      Q7 Z1 M8 y4 p7 {
32. #include <linux/sysctl.h>
    ' G, O- _, s1 ^& Q8 c0 k& l5 Y
33. #include <linux/mm.h>
    9 U1 w0 U2 f0 W
34. #include <linux/dma-mapping.h>
    " x1 ^; S( u- h) z' `8 B; n4 ?
35. 
    
36. #include <mach/memory.h>
    0 x. v/ O4 q2 k
37. #include <mach/hardware.h>
    + o* X  H) X* V* O2 d% Z% N' u
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    2 D% G' ^2 F# F: `
42. /*#define EDMA3_DEBUG*/
    
43. 
    1 i' _, B9 {* A* j& V% g3 M
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    * E' R3 B7 K7 N( v" D
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    8 W/ m1 z8 Y7 k
51. #define DMA_FN_OUT
    
52. #endif
    - O0 J6 n2 \) \) ?+ n
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    : Y( k- s% s. Q" S( r+ i
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; O) j+ u# `5 f+ o
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      I% I0 D' V# ~" Q
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);
    ; o, P, f* g! S' m0 I' ]5 X# x8 h
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) N" }( u' p. B  C  H8 Y3 t
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    : R1 ]6 x" L8 b- X
74. char *dmabufsrc2 = NULL;
    . X6 P+ C: t  t/ x
75. char *dmabufdest1 = NULL;
    & p2 i% u! p' I2 [! Q% s
76. char *dmabufdest2 = NULL;
    
77. 
    9 o8 D9 T+ d' P# a2 |
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    / ?8 ]6 B& x, w4 H( [5 x
81. 
    7 A) N' J/ |5 @$ L  p- B! o2 I
82. module_param(acnt, int, S_IRUGO);
    0 `& q: o8 n$ K4 R5 P* l4 o
83. module_param(bcnt, int, S_IRUGO);
    * K9 |( S, w5 s' g& z! b" }
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
( S; k8 |4 Y) s3 H4 Y, 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。

  d5 r5 u/ b% g" t+ D" l: ^, T