OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 R5 I1 o$ P- q( k4 U4 I2 B

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ) c% b; ?+ t, N1 D4 }
5. * brief  EDMA3 Test Application
   ' k. Q# s( t& ~# G2 I# p
6. *
   6 n* G+ L0 n; F9 i4 ]: H' v
7. *   This file contains EDMA3 Test code.
   3 _1 ^8 @  R: R' |
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   2 f+ b+ B' t" l  _% w6 A
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    : p5 h8 p3 Y5 @$ Q( M8 h
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 F: h  n* @0 a# R, Q) W/ v
16. * modify it under the terms of the GNU General Public License as
    4 ]! h6 h$ t$ F# R  r+ k
17. * published by the Free Software Foundation version 2.
    ; H' S9 s; P& v" ~7 _2 N, i9 |+ l
18. *
    7 T; m7 I( U8 a" ^7 _% K
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & }! M) F. X7 R/ f; d9 Q
20. * kind, whether express or implied; without even the implied warranty
    - t" x4 ^( \7 n- b, y
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " E* }) X+ q2 h
22. * GNU General Public License for more details.
    4 u7 [. N! I2 a" ^, \: a
23. */
    ! w' ?0 O& Z! m* X
24. 
    
25. #include <linux/module.h>
    . h2 v9 S5 f% o8 l: N" F
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    0 ]. Y9 z- x: M# ?/ _7 v8 s+ ]0 p
29. #include <linux/interrupt.h>
    # W9 [5 e' r$ B7 {& ^1 u
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    5 ]& s  m) m2 m% p3 j
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    & S9 n) O: [& I6 F) Q) z8 j
35. 
    
36. #include <mach/memory.h>
    3 N0 I: V9 N4 Z/ L2 M# L2 Y5 I9 K
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & O1 s; @7 K2 D/ f
48. #else
    
49. #define DMA_PRINTK( x... )
    1 G: ^$ X. f6 Q
50. #define DMA_FN_IN
    ) N0 ?2 S: V6 `: S! l: T0 i
51. #define DMA_FN_OUT
    * H, T& R2 P0 ?" X- A
52. #endif
    $ t9 e. v5 T9 {+ y+ E
53. 
      q9 k# `& A5 f1 Y- t4 c% b
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    2 z# d$ x9 K2 H% w
57. #define ITCINTEN_SHIFT              21
    2 l% b/ @7 f, N$ c$ }6 ~
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    9 l+ j& Q, E) z9 a, A" x& N
60. 
    7 a: ^3 A. T- E1 _
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ' ?* _  j8 \7 X9 e9 V2 @
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);
    ( M7 }1 e) k! U  l8 v) N9 {
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 w8 S$ V: ]; k) S
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    * V: N/ M6 Q0 Q1 C7 P/ S$ U& e
69. dma_addr_t dmaphyssrc2 = 0;
    - u' q/ o% W( m" u7 R8 n/ `
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ; n$ H/ b+ _/ l& g
72. 
    ( u) h1 `5 e$ f3 h
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    0 D5 i- d; N: X8 [* l' D+ c
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , u8 u2 r9 |6 C/ x3 k% }' Q1 L
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * o( z" T- {6 Q* i( f8 s
80. static int ccnt = 8;
    ) |5 O+ }/ v  T- M3 {; E: `' ?1 D0 r* L
81. 
    8 C, }" h+ a; y3 z: ^, s6 S
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    6 D7 _( ]6 \9 b7 {" _
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
/ a( d( @% @, r0 e+ A: {' iarm-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。
3 ^% f$ S( e) z( ^, u, q; s7 @( N
( [/ N- B0 Z6 w  _3 j% a