OMAPL138如何在Linux下使用EDMA3驱动

yyj

+ O- d: @; L& W& J) g. l

1. [code]EDMA sample test application
   
2. /*
   " Y4 Z, X6 X/ a$ |2 Z9 Y
3. * edma_test.c
   8 i# O- w* Z- z
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   1 M- h/ x2 k& T7 S
8. *
   9 s$ H/ y) d9 n9 m, t: ~8 p/ J
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.
    
12. *
    6 A2 V2 U" _4 a- m1 l# P' {
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; L' g/ }9 ~7 L% B$ U" e
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
    
17. * published by the Free Software Foundation version 2.
    ( U4 {- b4 T, J  y: B5 `
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ; k1 Z0 x) u- R' x$ _. |
20. * kind, whether express or implied; without even the implied warranty
    . C. P" R% n1 N! {7 u, u" r8 W
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 f2 s  ^: |7 q0 c% n+ K
22. * GNU General Public License for more details.
    3 R) T6 ~( t; g: W2 x
23. */
    " a( H% P0 j7 T7 w  A, V/ G
24. 
    
25. #include <linux/module.h>
    + W( ~& j0 C2 U& l* E9 p
26. #include <linux/init.h>
    % x2 \  J' o7 X0 y" B
27. #include <linux/errno.h>
    * H0 A, ]/ ^3 }5 P$ |4 h. d8 q
28. #include <linux/types.h>
    4 K) v$ g/ v& U, B$ v, X! E
29. #include <linux/interrupt.h>
    ( d) ]: R, F3 m. g; r
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ' w, Z4 v" z5 O& o4 O6 M
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    / R8 y1 U) T# _/ V) a1 _
35. 
    
36. #include <mach/memory.h>
    . i4 ]% ]9 F1 l
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    # \7 ]4 p" a) H( B0 N9 F6 b
39. #include <asm/hardware/edma.h>
    3 j# L$ O% P0 i3 W- Q9 p/ Q
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    7 b0 p2 x5 K; d* e3 f# @
44. #ifdef EDMA3_DEBUG
    7 i* a0 q  ^& p" G: x
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 B5 y: o: Q( |, y3 o5 m+ n0 z5 X
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    9 N2 @% ?& u" U# L, |
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    3 _4 n0 s7 m  u" C5 ^
48. #else
    ; f$ H- m7 X9 D' K& N: [
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    0 k2 h- P7 k  V3 K: [. ?6 z
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ m7 h! E& n% O2 D$ ]  O
55. #define STATIC_SHIFT                3
    + j- Y3 M& o( F2 y
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    7 j* m; Y1 \# 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);
    ) j6 K! L% H- c$ n0 \3 h7 a
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) v) P& i2 r* u
67. 
    % u) a# S3 n4 q" Z/ Z) G, O# y
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    1 N/ w+ h: j2 H% d# x# f
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    8 u( I! \5 _' D
76. char *dmabufdest2 = NULL;
    ' S* l# C3 \6 x3 l
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    , v) O3 e  N9 {: F6 H
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    & c" v8 T, C3 P9 g
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

) [+ U7 ?5 r* E$ T; r4 B+ H
0 S+ d& a1 |4 d0 A( R  J      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。
, {# u) c; p# Y4 Y( X, T( e     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 r) ~; I% q2 w* Y# P: X  s