OMAPL138如何在Linux下使用EDMA3驱动

yyj

: ]3 L" d7 U+ F, N; }; |, R

1. [code]EDMA sample test application
   9 T; [  l' `# `/ K1 i8 S
2. /*
   " q  O9 G; X, Q" ~) s9 a9 }- ^
3. * edma_test.c
   5 m) S$ K2 g+ \+ L0 l% j0 O
4. *
   
5. * brief  EDMA3 Test Application
   1 ~: z! S( S2 t6 i
6. *
   4 c! p$ W5 P: l- H" b
7. *   This file contains EDMA3 Test code.
   
8. *
   . z) M  a3 Z4 U! q* w& D, i6 i
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
     U, X! m% v" U, ?. }( t% p
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    / A$ K! \& M- q" w3 D
11. *         TO CHANGE.
    - D2 T( T) s, x: w
12. *
    7 q) e- N. ~/ @( [4 B3 L! t
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    6 B+ i, }+ x5 |) C
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
    3 a+ A2 s, F: r! `
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
    7 f- J1 }# \" I& T* P' e; J
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    2 O. l9 s# T3 X1 n" q
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    + L$ z, w7 q$ y
27. #include <linux/errno.h>
    % n8 x" }6 T3 A, E3 C
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    . N4 t8 S4 G  |8 `+ N5 P
30. #include <asm/io.h>
    : [8 L( f' I8 T/ I; ]* m
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    2 S* T6 v  n# b' f+ O  G: C- {; ?
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    $ p9 o) U% s6 d! r( ~
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*/
    2 J1 P$ S! L5 I) ]1 `
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__)
    5 T5 K# r2 c, m) _0 w
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 e  ^% D$ n: F4 {% w6 S. y+ e
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 @$ w# V1 N2 ]
52. #endif
    
53. 
    - d& \4 r+ l% v+ P5 Y" P
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    7 K& X4 ?0 D# T- e% }5 p
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    3 q# L' s  \1 m* l
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
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);
    . S8 V$ q; B1 s9 E- C8 j( L9 o- U
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    4 I) E' g3 I9 Y6 z. ^7 y* i, q/ [
68. dma_addr_t dmaphyssrc1 = 0;
    4 H$ b8 r$ k. f4 ?6 P, m' \
69. dma_addr_t dmaphyssrc2 = 0;
    / c3 _" i5 W% U( C
70. dma_addr_t dmaphysdest1 = 0;
    4 V! s2 B% W# E
71. dma_addr_t dmaphysdest2 = 0;
    ) z# K( B) @+ t$ _4 d: X+ F7 F% f5 m7 {
72. 
    
73. char *dmabufsrc1 = NULL;
    ! }% X1 b3 ]% ]0 u4 r
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    / S2 E' X3 A! L) d) K
77. 
    
78. static int acnt = 512;
    / p  A8 w: }& l6 ?2 Y
79. static int bcnt = 8;
    $ R7 |) G0 j& o3 X% |/ @& S
80. static int ccnt = 8;
    8 n; y4 B1 x3 k6 @
81. 
    9 `7 I, S% q4 m9 x, P2 r& V7 R
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

6 v! S% V: X; U$ i6 `      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
+ @( G5 V$ Q: darm-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。
, L/ s& `* v* X! u0 v' P
+ g6 ^1 a0 b  f5 r/ |
' K3 P# n  u- w- ]