OMAPL138如何在Linux下使用EDMA3驱动

yyj

. m  y4 D: L$ M. d2 M

1. [code]EDMA sample test application
   
2. /*
   $ ?8 T5 U' y, P/ F* S" w. q
3. * edma_test.c
   , ^! g* H: a1 _' ?8 ?. h& b$ }+ o
4. *
   5 _( @0 {5 G5 {  q. B
5. * brief  EDMA3 Test Application
   ! x3 x7 m# W- B  ^% r- r( U
6. *
   ' W# L3 w% t. t7 ?& P& p
7. *   This file contains EDMA3 Test code.
   / R2 v& v- p- m' D4 z# k8 w) ~
8. *
   " C  P/ \' L; M, T! L
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( _* A- n" z8 q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ) c9 D# B% Y. n6 T" L
12. *
    " b2 E7 i) \% U: Q
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    . d0 `% _* K2 v/ R
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
    ( E- P3 C1 x1 |1 u% s
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ' b% h3 }8 W, x2 A
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    6 I* S- p/ T6 Q7 L9 }
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    " g1 N5 x0 x' d9 y+ b) x
29. #include <linux/interrupt.h>
    ! S, }6 U: J5 ~" K
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
      W% d5 U7 g" I8 H' n
33. #include <linux/mm.h>
    " {; u. m: j" ]( A/ q. G& W
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    - Q% N0 |/ @) S- b0 Z3 j
38. #include <mach/irqs.h>
    ; S1 x1 L  h  ~
39. #include <asm/hardware/edma.h>
    
40. 
    0 [# \9 d& Q$ E! A, `
41. #undef EDMA3_DEBUG
    " D1 b5 `2 Y0 s! ?- \* D
42. /*#define EDMA3_DEBUG*/
    
43. 
    7 T1 R+ |! z; Y( i7 H+ o
44. #ifdef EDMA3_DEBUG
    8 a9 e, j3 ^3 T% ~2 i$ r" P
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . B$ U8 j* _: R% U% r
48. #else
    
49. #define DMA_PRINTK( x... )
    - ?# H+ h1 \6 I* C
50. #define DMA_FN_IN
    0 x) @9 x/ p3 ]- K
51. #define DMA_FN_OUT
    ( f+ ?1 S" v' v. s* q/ j5 ]1 @
52. #endif
    $ k( f/ Y3 a3 b7 a& C
53. 
    5 W1 C0 B8 S  O* w1 X. j
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    5 Q+ [6 [+ C- c- G
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 t. n4 Z0 t/ \( p# _
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / d7 \% g- n/ |* U4 |* h2 J1 h6 G8 F
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);
    
67. 
    7 e3 c: X( e4 J* x$ o
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ) Q- _. z; U, m8 V# o7 O
70. dma_addr_t dmaphysdest1 = 0;
    ; o% `. r8 r" B" f
71. dma_addr_t dmaphysdest2 = 0;
    : F/ m8 u% X  }/ K/ j: g) S6 K  Q
72. 
    : K, o! D; \0 X0 g7 P( g
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " k  i+ e- F% _  b+ ~* s- @
76. char *dmabufdest2 = NULL;
    , [3 W4 o) i- Q3 F1 M
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    * D' l3 z( m* T2 R, J1 [% ^1 n) Q
82. module_param(acnt, int, S_IRUGO);
    # `  U* J- _/ K. V7 a
83. module_param(bcnt, int, S_IRUGO);
    ; _% Y0 |  ^. J) ?. ~  W% K/ r
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
' G  i( y  g2 K7 q) O' |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。
& [* I( U+ v9 |0 r7 R" s8 w, y% t3 n2 s$ }     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

/ O9 g9 W: W6 c6 m' T$ U6 H