OMAPL138如何在Linux下使用EDMA3驱动

yyj

) f" d1 h$ x: N, L- b

1. [code]EDMA sample test application
   " N) ], s4 P6 y1 X' _
2. /*
   : P% k# C: K. ~3 h& |
3. * edma_test.c
   
4. *
   2 m9 y) i( |+ f; S( |, M$ |6 w9 x
5. * brief  EDMA3 Test Application
   
6. *
   / d1 E& d& g9 o2 ]7 @- R( `
7. *   This file contains EDMA3 Test code.
   7 g8 L$ ^7 h, F3 E2 D
8. *
   7 R. v8 ?/ J! E' w
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.
    % F$ b# E! `7 U( z
12. *
    + y: z, `& {9 U' ^! ]# g: v6 \; {
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    0 X6 s+ t( U* l
14. *
    8 V( j! D$ @, o
15. * This program is free software; you can redistribute it and/or
    ) e$ C  Q! `2 X) {( L
16. * modify it under the terms of the GNU General Public License as
    . l) K5 ~4 X$ U: j  s$ V! G% e: e
17. * published by the Free Software Foundation version 2.
    
18. *
    7 |, b2 x: w( W# ], a5 C: P" @- d
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ) W" Q. {& R4 L- D6 l
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    9 n( A6 ?. Y- g% ~
22. * GNU General Public License for more details.
    % J' ^) ?# Z9 ?- i% y8 T9 R6 A
23. */
    
24. 
    ! V2 l! F6 U9 m% X; X
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    6 C0 S6 j) w' G: }) z( x7 V' d( F
28. #include <linux/types.h>
    " L) P" r8 L1 x3 u. |! b% x: g. e, T
29. #include <linux/interrupt.h>
      l% p' Z* Z% F' k
30. #include <asm/io.h>
    7 U% [2 ?! N: E; R3 ]
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    : z  }4 J. ~: `7 W
33. #include <linux/mm.h>
    : B+ K% L( l2 W, {
34. #include <linux/dma-mapping.h>
    
35. 
    ' p) Z- L* H) I% i0 R3 Y! Q! |
36. #include <mach/memory.h>
    7 h3 m' G' a' a- m
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    . `# D/ n! h  [- {* g: P. L2 j+ L
41. #undef EDMA3_DEBUG
    7 s; Z- p/ a0 E6 M+ h
42. /*#define EDMA3_DEBUG*/
    
43. 
    / K+ f) r+ \8 q" Q9 L: ^
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 t7 ^' L& i1 d6 M0 J1 N3 D) d& K( t
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    1 x+ }! X2 C, `( n+ A
48. #else
    ; A! _- G8 f( B% x/ g
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    & U! _* j; M8 L
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    2 x( g! R& V$ z) ^% }, T
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    1 x; h" {" @, _* U
60. 
    7 h7 N- I: w& z
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);
    ! [4 ?0 a, {2 E# i9 ]& }
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    . m1 p5 o5 X3 V$ ^" ?: m; w
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ) Z) ^- Y! i6 D6 y2 {
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    " `) {" O( i* v1 c: z$ @2 ?
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    8 _5 y. K- H# |* z
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    : S' @2 F& s3 U; {
81. 
    $ W1 E9 C3 {( v* v
82. module_param(acnt, int, S_IRUGO);
    # T3 ^0 _' P( |; \" O  b6 K
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

4 z1 [, B4 d0 |4 |! W5 S
3 v0 T% g/ S4 a, c5 s. Z      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。
2 M( u1 {# L9 t1 H3 A     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
% E: b) P% I2 m5 E6 Y. [% ]
2 b/ D8 N8 W  H9 I* ?; W1 Q
! Z, J' p* H' _