OMAPL138如何在Linux下使用EDMA3驱动

yyj

! j5 D1 x/ f5 l6 b1 ?- I" [$ u

1. [code]EDMA sample test application
   2 ~+ M6 B: i. ^! T
2. /*
   * h- U- V* z( B- X) H0 f& q
3. * edma_test.c
   7 r! S# l* @# [" O9 }& u- C6 j" A  M
4. *
   - a2 i' n; W" h' N% H: j
5. * brief  EDMA3 Test Application
   , V. p- D" n2 C  J4 @# `5 j
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   2 X# {4 Z. K" v4 c7 p
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 z0 Z' F+ V* p7 ^, C
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    4 O+ w0 k/ h3 l- `9 u
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    4 d. K" C7 @/ c* q- p
15. * This program is free software; you can redistribute it and/or
    $ A) }' ^' y& T% B* W
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    $ A; F( Z7 Q0 F/ Q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    " C' l' V$ m6 A' M! [) C
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " [3 M- T5 f- L% U" w
22. * GNU General Public License for more details.
    $ |+ q+ m1 }& G: s
23. */
    ) `3 V0 G) `, g8 f7 Y  p% G. \
24. 
    
25. #include <linux/module.h>
    % R, L: z, {! c* x
26. #include <linux/init.h>
    7 w, i8 |! b4 x9 ?2 D9 H# \9 Q
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>
    ! T- L, w4 T  w
33. #include <linux/mm.h>
    & y) A! J+ F( V: v/ B& t' d/ h
34. #include <linux/dma-mapping.h>
      z5 K( L5 |, [- Y
35. 
    
36. #include <mach/memory.h>
    8 t2 D+ W' k- z" A2 q
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    . M0 Y  ]# z& L% E& a$ {8 z
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 W8 L  s4 S/ f. ^7 J2 Y
43. 
    
44. #ifdef EDMA3_DEBUG
    ' T# D) q1 ?9 ~' H5 t
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' d8 p/ @. R2 U; M
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 X: `- }- V6 t# I8 p- J( N6 `+ I* s1 ~
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    , j- b) w: c. V
49. #define DMA_PRINTK( x... )
    $ q6 ~, e' X, ]
50. #define DMA_FN_IN
    " H9 j; ?7 I7 |8 ], _# K9 \
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    + l- t5 x6 Q9 t; u; e. l: s/ h5 c
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ' `  _8 H- P9 o) {5 o6 |9 Z
57. #define ITCINTEN_SHIFT              21
    / f/ }1 l+ f/ g' g1 q
58. #define TCCHEN_SHIFT                22
    8 H/ O7 F/ p* V6 q) _8 z
59. #define ITCCHEN_SHIFT               23
    4 T/ @- ^8 D. [4 D. n
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    9 _2 W- x9 M4 [/ E- k& e
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
      T$ Q( M) U1 b7 D) V. B
68. dma_addr_t dmaphyssrc1 = 0;
    * F3 i) U* {- m# d3 \
69. dma_addr_t dmaphyssrc2 = 0;
    ' a$ w; d" W  T0 ]) ?
70. dma_addr_t dmaphysdest1 = 0;
    ' @$ ]4 R7 @; N
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ) z- Q# q$ M1 H. J/ x. Q
73. char *dmabufsrc1 = NULL;
    ) D+ \- V# J) V3 W* G) A9 v" c0 h' S
74. char *dmabufsrc2 = NULL;
    & K. D7 C- G' O& w+ @2 s1 c: R! D
75. char *dmabufdest1 = NULL;
    3 W) v6 q# Q! }# _& D( Y
76. char *dmabufdest2 = NULL;
    
77. 
    8 J4 J% o+ l+ B( s, q! f
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 e3 _2 a8 L9 l
80. static int ccnt = 8;
    
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。
/ @: s% D$ \& Y" h2 h     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
) ]* U; G0 S8 g1 T' w4 r