OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 m# z  ]/ \+ R7 y

1. [code]EDMA sample test application
   0 a+ P) t  q* B( B; g  }0 @6 i
2. /*
   
3. * edma_test.c
   
4. *
   / ~/ ]: q* u5 j
5. * brief  EDMA3 Test Application
   7 k% I8 V& c  Z1 z
6. *
   # J6 A5 K# n9 |8 T
7. *   This file contains EDMA3 Test code.
   ; N& N, P4 Q5 a# Y; Y
8. *
   5 e$ _! Q0 d+ k/ Y$ w- j! a
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( V  a- K) U, x
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    * O9 }6 z' V1 b3 \3 X' Y$ f5 F
14. *
    ; A0 I) E9 \. i  _* q3 r. t
15. * This program is free software; you can redistribute it and/or
    : w. w  j) }8 s: M! E* P
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    " C' T0 \" }5 h. }2 S, E1 x' w; V! l
18. *
    ( Q4 \! m3 I6 X+ \' @2 e
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & j1 F) A0 B9 l4 M  d: {4 {4 n
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    7 O! [. S; G$ i1 t* M
24. 
    5 V% d$ E" F' m
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    3 Z$ A4 e' K# a; R6 E
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    ! r$ y5 n$ l* Z/ @
33. #include <linux/mm.h>
    + `; L% {& h0 ]. n2 |
34. #include <linux/dma-mapping.h>
      @- f; S! {4 @3 R
35. 
    
36. #include <mach/memory.h>
    . ~5 ~. b% W# y+ p, i, D$ A
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    $ n: n6 c/ p, o" M; T( c
39. #include <asm/hardware/edma.h>
    
40. 
    : n! h& b9 E% Q2 [- _3 W
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)
    8 ?# E. a, b( }- q5 C! g
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    0 ?; H. z5 G8 ~# D/ {% t
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ; D  K( x7 ~: {5 A3 V4 ~
51. #define DMA_FN_OUT
    
52. #endif
    * H* x1 g2 T2 R/ m% U
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    # q8 D- h; V, {6 d! P; G
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    * ]' i( u0 m; h1 v) U
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    + o# L  C3 f2 {  J" l2 X
59. #define ITCCHEN_SHIFT               23
      t! ~) v2 s8 j; }
60. 
    % x  h- U( }' j+ f3 ?" s
61. static volatile int irqraised1 = 0;
    6 c% v3 [& s) p- e# G# N/ M
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    4 o8 C1 n/ _+ L3 g
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. 
    ) }$ Q- m! h1 X4 _. J
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    5 Z3 a) t, b! M9 v+ m
70. dma_addr_t dmaphysdest1 = 0;
    9 z1 X, T; M" u/ T4 p
71. dma_addr_t dmaphysdest2 = 0;
    9 @1 ]  ~" E) `2 L0 K; T' J6 V
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    2 T( v* w( `& W4 P: v
75. char *dmabufdest1 = NULL;
    / M2 D; t" f2 I
76. char *dmabufdest2 = NULL;
    ; Z" w+ _" o! k9 ]
77. 
    
78. static int acnt = 512;
    / r7 p/ W- x  S& c
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    8 M/ @; R1 s* {# `& ~' W7 ~
81. 
    
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

      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
( c0 i" W, [8 }, Z0 W
/ E* `* x& Q1 T: p& U. s( H9 d$ \
3 Y8 E, u- Z1 K