OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 W8 l7 n& k" @0 I% ?

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   3 D: C6 v, e1 ~
5. * brief  EDMA3 Test Application
   ; d# Z  l: Q( D
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   : c& o% V' K% @2 Y* a' ~1 i8 Q
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
    6 z' n" Z$ n7 s- P
11. *         TO CHANGE.
    
12. *
    7 P( f- a7 v! v
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    4 @6 S& W/ [/ S- P
15. * This program is free software; you can redistribute it and/or
    8 r3 a4 {8 Z" o5 Z/ G* B
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + k1 |& C- V% f3 S, W: x( n
20. * kind, whether express or implied; without even the implied warranty
    % q- U- t1 L% F4 L
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    3 z7 U# ?; Z; D' ]( }2 m$ l
23. */
    
24. 
    
25. #include <linux/module.h>
    - [& \3 V5 G" v1 `$ G
26. #include <linux/init.h>
    / p% J6 b: o( V. p/ k4 }$ n
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 m" m) A8 S/ I' `: H
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    " ]8 r; T9 t0 {1 u/ d; c
34. #include <linux/dma-mapping.h>
    
35. 
    - a$ S. p  L$ M* E/ V
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    . l: m# N, B1 V" s+ m8 z. U
39. #include <asm/hardware/edma.h>
    9 ?4 W* A# }% U0 j' V- z1 S
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    / Y3 c5 J5 V1 x+ }
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 b; v& S6 J. i  y+ a
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , i* I/ [5 D+ t
48. #else
    : Q( G8 t1 v" o4 l/ M1 J4 ~; Q* J$ ?
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ' L$ X: z6 W& V( ^8 ]
51. #define DMA_FN_OUT
    $ J, I2 q( M5 V% U5 ]
52. #endif
    2 y0 U4 D' Z  P/ `1 q! h
53. 
    & L9 w; F/ c8 G: r2 p" a* p4 J
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    3 p3 K2 N# T5 k# i# ]2 [1 J
57. #define ITCINTEN_SHIFT              21
    , t! [& l1 X+ ^9 b5 `% M2 T" M
58. #define TCCHEN_SHIFT                22
    ! _5 }3 L  n; [
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ' O- c( }0 t& w
62. static volatile int irqraised2 = 0;
    + P3 y: A3 f" W9 A+ |, u
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);
    6 B# H( o: a. t0 J7 s) j6 D
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;
    $ n$ q0 R- |. [: U  [# ~
72. 
    2 e1 B7 _5 W; t
73. char *dmabufsrc1 = NULL;
      s& h  ?2 e; s9 k# x; k
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ' W5 {, D! z( {9 O7 y" H5 u
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    + G  }+ p9 ]" F  A& [% F
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 [$ x- d6 D& X2 E* {. s
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

. g! x# @" s+ w5 v# {, W1 z; ~. S
      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
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。

8 X9 w4 y" V' C
) d3 }4 Y: v) S0 A  S6 S5 ]