OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ i1 X! i; L4 L, D: r

1. [code]EDMA sample test application
   ! y. T* j+ l/ T  i0 O  ~* N
2. /*
   # a" Y+ @: ?6 |) ?4 E5 p" W
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ! u! ~% [6 }- X1 `, V
7. *   This file contains EDMA3 Test code.
   - q" \, q& n4 M, S/ @! I
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 ]8 j) s7 r1 X4 H" _4 A" d! Y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    8 M4 Q/ z" ^. b/ J+ c0 ^2 n
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ D% S2 X1 R, k: t/ H
14. *
    
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
    . y/ I1 j# D% C9 ^1 W& A. q
17. * published by the Free Software Foundation version 2.
    
18. *
    3 k- S  j, Q5 N! [( ~
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 A, h1 R* M- J& m! l4 j/ r2 j2 n
20. * kind, whether express or implied; without even the implied warranty
    ! j$ |. V( ~4 v9 F6 ~( p1 ~& b
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>
    7 Y, u3 {9 O, h) N
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    , }. \: k/ G$ j. ~% A
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    / ?" g  z, U# W/ e( P7 O3 ~' b
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    1 f  R8 h) e$ b9 e$ ], R
34. #include <linux/dma-mapping.h>
    
35. 
    ( \  j6 M& v: l( x  G& ^, H
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    7 Q! Y% x1 f1 l% W6 G' m0 h6 M
41. #undef EDMA3_DEBUG
    + l6 M- n" Y) m; w: x  e9 W: D
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    6 y8 r' S, w& x0 O
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    8 `+ U" b7 P( y4 V( k1 p$ z+ m: J
50. #define DMA_FN_IN
    ; p" ~4 C0 @' b& n5 ]
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    $ q$ T' J9 P9 z" {$ Z9 s
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' @. B) S# ~. b" R$ w% @" i3 }
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    * C- G' h9 z8 i9 a; J8 n: _
59. #define ITCCHEN_SHIFT               23
    7 Y" F& |# \1 ?# ]* l& L2 n
60. 
    9 g5 u; c) e+ x3 t: ?
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);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 N" d1 F$ h' N
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 j2 k. g5 Z4 a' L0 n4 V
67. 
    + ?" M( \( N% G: m
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    5 H! u9 R3 G7 L, |4 e0 a" H7 `
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    , ]6 n( I0 ?, ^! b- o, c0 ~
72. 
      Y- j) y1 Y7 ~6 d3 N* f8 c
73. char *dmabufsrc1 = NULL;
    5 }5 p2 ]0 m6 r0 U' a
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    0 \1 k3 J" o( y. y; g/ Z
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    5 M% ^8 D$ A5 `9 C6 T
79. static int bcnt = 8;
    - ^5 ]+ Q0 U1 I. f7 {
80. static int ccnt = 8;
    - X3 h& |7 R! Z1 @
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    4 m/ |7 C, w( {( ^& i& G5 f
84. module_param(ccnt, int, S_IRUGO);

复制代码

9 W) @" C" a" i1 X5 p      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
5 {" _; \7 }& y, ?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。


) f/ V8 u4 {' \+ r5 E8 c0 ]