OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ K/ O& l4 h7 N3 D

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   ; h$ W0 z1 _+ s: b! X5 [0 G+ B
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   4 J7 u( F5 `7 l" P
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    6 w# P* ?$ d; W/ d- b
11. *         TO CHANGE.
    
12. *
    6 _* R& ?' Q+ Q# g% I3 u
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    5 P9 n4 W& b. @/ s
14. *
    ' `& A/ K3 U( h) y8 ]9 e
15. * This program is free software; you can redistribute it and/or
    * {( ?% Y; Q/ |
16. * modify it under the terms of the GNU General Public License as
    5 |6 b1 \1 S6 z, I+ M
17. * published by the Free Software Foundation version 2.
    8 m) p8 U) j& ^$ x3 J$ ]! |- O
18. *
    0 {- \6 N. [4 p0 \2 R/ z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    8 k% S. K; w2 I. `" s% N* w1 i/ Z1 s9 j
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    9 v$ I8 E1 q3 R( C* h5 ?7 r
23. */
    
24. 
    
25. #include <linux/module.h>
    , C  ?4 Q' O1 b
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    4 n7 Y3 p! y/ c
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 n8 R, v7 ^6 W. H# Q, r
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    + a; ?6 `) ^7 _( d, P0 Z. _+ \
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    $ ^9 r4 |- q- @0 U& h+ Q  \3 r
34. #include <linux/dma-mapping.h>
    
35. 
    . ]' o1 d' [7 v) }3 u
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    / ~! r& e2 A7 R; Q/ w$ z
38. #include <mach/irqs.h>
    ' K# _9 K5 f7 q5 S9 [' f5 ?# h. l
39. #include <asm/hardware/edma.h>
    . j  P6 {; I6 t% e$ i9 i' h
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    9 `3 m% h+ _+ o6 q( A* d
43. 
    
44. #ifdef EDMA3_DEBUG
    9 n& m! N: r: v1 }' L* m
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 [. H* K2 l! E% i/ m
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
      p5 N% l' w: j9 {( r4 d# _$ s% O4 p, @
48. #else
    3 j$ B: y; g% G: Q1 g/ C. x; i
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    # P0 {5 i/ k! _
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    3 _7 M' p" H8 M2 o
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    - o9 Y8 |& G& c
55. #define STATIC_SHIFT                3
    4 u0 U: W: ^0 D" F  L/ T1 u2 h
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    * a6 m& _# w/ n" L9 g- @5 P' U
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' E5 S% N% W. t
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    6 f0 G% e2 H+ w
75. char *dmabufdest1 = NULL;
    3 J: t) k2 R$ J
76. char *dmabufdest2 = NULL;
    , h; Q% K7 U8 z" N$ g, E" u; v+ |
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    + Y8 |" T) y2 }# t$ e
80. static int ccnt = 8;
    " \! _5 Z+ k+ i/ Y: H5 E
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 C1 u" n# I9 F# H/ L3 G7 O' ~      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
7 ^: }1 ]' b, parm-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。
; f4 `$ m7 s  P+ R3 q7 Y# ?2 [) Q
( B4 y/ |. x& M$ d, y- ~. O