OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   % [, r, m0 V: i$ m
4. *
   8 H. \2 r# L8 z
5. * brief  EDMA3 Test Application
   
6. *
   ( W6 m2 T$ w# E% t% q* {
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    
11. *         TO CHANGE.
    ! ~$ R  D- H! e1 u2 H( q6 w) h9 B
12. *
    & d6 Z$ G) x' ?
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    % `, l5 v( v, H
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    . v* q3 R$ ?$ H1 g5 ~
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    $ {: N$ v; |5 T( Q0 W! E
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * d, u( z& ]3 t; m$ P0 U, ~1 z
22. * GNU General Public License for more details.
    9 g% |1 E! ~" t1 o+ O
23. */
    
24. 
    1 Y. g. q3 H2 [9 `
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    2 Q* l" N% F! J, e/ A+ Y
27. #include <linux/errno.h>
    ' [& e/ x- N- o
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    0 _* D2 x3 r% M5 _& z$ N4 P# G
31. #include <linux/moduleparam.h>
    $ F" T. V; _3 c; P& s
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    6 {' `1 P- l7 ]6 c- Z$ J+ [
34. #include <linux/dma-mapping.h>
    % s6 q# T* @$ L) I
35. 
    3 d; J# Z4 h, M3 c* g- U" }, @% R! Q# J
36. #include <mach/memory.h>
    * h6 r, n& @/ h3 \% }7 w
37. #include <mach/hardware.h>
    7 K! X# d9 s+ g3 }
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    * ?: _3 f0 n' J; B  }! O+ [
40. 
    
41. #undef EDMA3_DEBUG
    / j3 g( l$ r: H! F
42. /*#define EDMA3_DEBUG*/
    & F4 [. ?) [2 M: i$ O; Y& |- Z
43. 
    . \8 b$ W) ^8 h2 M% ?
44. #ifdef EDMA3_DEBUG
    % H3 N) ^( \$ Q4 S
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      Z; X- X1 A; C- c2 d
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 E2 `4 r- y" O' }" r, |( ]9 r9 ~( f
48. #else
    
49. #define DMA_PRINTK( x... )
    / Q  |9 j2 ^+ n& q: P
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    7 B* Z, x( Y, U" o" P; e" ~7 h
52. #endif
    
53. 
    ; P0 C; O" S% b/ L) A3 w3 n6 {% f
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    2 h& R5 X6 n( r7 @- A8 ]
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    $ Y- S: }; r9 k7 d- l" A
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    % q9 o7 z! i! ]' U4 Y3 M0 T! v( q3 x
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' v  i" p/ V2 V% v8 T1 a
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' ~1 F& X% \1 X( |
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    / C6 u5 ]+ Y  k* y
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - t) n1 a" K/ [. `6 Y1 ^
71. dma_addr_t dmaphysdest2 = 0;
    $ D3 \7 D$ ?  L; U
72. 
    ' D& c7 b# e+ _
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    4 E: G$ c1 g5 O
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % i: g8 W2 y' H6 x! v1 A7 y1 U
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    . g! f  o& \6 ], ~1 O6 r- N0 y! f( V
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

      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
/ M- s% I9 R# l2 b2 t. N( {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。
  O1 ?- X5 X! n6 I0 f

1 ^4 o) {- {3 Q0 {+ {