OMAPL138如何在Linux下使用EDMA3驱动

yyj

: Y  `0 R/ K8 Q5 q& c9 I# a/ z

1. [code]EDMA sample test application
   4 |8 N& A' A$ u9 ]4 `# A+ t  D
2. /*
   
3. * edma_test.c
   2 e# I7 w" H# j$ q: O
4. *
   
5. * brief  EDMA3 Test Application
   0 w7 Y" K7 h' C2 V
6. *
   
7. *   This file contains EDMA3 Test code.
   2 n7 y; s# b  Y. |' ~: n5 r
8. *
   
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.
    ! B) R4 K" P' N1 O2 N0 t
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 Z# Q" T# t. V1 g$ W
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ) y" I8 k+ N- l, U- n3 G
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + i1 u" n5 B9 n- R4 o
20. * kind, whether express or implied; without even the implied warranty
    5 T1 s+ f. C& u4 E6 n( R$ k) G! c
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ( [3 @9 q) ~  q3 R  R1 w4 `' `
23. */
    . Z: G' |- e4 X6 V0 B& h
24. 
    3 [4 N+ y$ f3 c( a8 H
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    * S2 e# e( @3 U' a+ m) T  b/ B
27. #include <linux/errno.h>
    , ]' _/ G; _! y: h6 I
28. #include <linux/types.h>
    3 _' }7 p  h; \* J+ u3 b
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ! O. \( [$ D3 d
35. 
    ) \; A. K, @, P3 a
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    / ]" ]3 I) D, s. _# G: R% @
38. #include <mach/irqs.h>
    4 y" q7 F( O& W* m8 E3 r
39. #include <asm/hardware/edma.h>
      c: \3 v* n3 Q) d& k
40. 
    - H% s" v' |; g
41. #undef EDMA3_DEBUG
    ( J& `3 K4 c% N  e
42. /*#define EDMA3_DEBUG*/
    # g# \% x/ l* n' `8 ^0 H
43. 
    ( q+ H8 J# E# x* `6 s
44. #ifdef EDMA3_DEBUG
    - z0 x& {3 N/ n
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 _' l# q% t- t& P; i
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    1 e9 E0 n* k* z: a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' L3 C/ N, ~' U3 f0 U
48. #else
      f2 D* ?4 B1 V- j+ v6 P/ D6 f
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    9 |# |* W# T2 C0 d7 L
51. #define DMA_FN_OUT
    6 y8 D. o! W' |+ k
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; G5 `6 z! J& h1 g
55. #define STATIC_SHIFT                3
    $ ~) O5 N8 l5 _9 x/ E1 l
56. #define TCINTEN_SHIFT               20
    , H$ ^! P, M. g) k+ J6 Y- \
57. #define ITCINTEN_SHIFT              21
    1 D$ P7 G: w! R! ]+ C
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    8 N. \1 Z0 V$ l
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    % Y4 Z- k3 Y! {6 W. o
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    + i: G2 n0 A; W3 {+ J8 U9 r, f
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
      n. r7 y" L! b+ e
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ h: O9 T$ C) r, {
67. 
    
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. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    1 S# j& o) Z  o% X1 p& B
78. static int acnt = 512;
      K, R5 h5 C" M* ~# M: D# Q, `
79. static int bcnt = 8;
    2 c5 P0 \; X1 Q6 w- [
80. static int ccnt = 8;
    + g; p- u; _5 D
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    % d* M6 l+ E2 i  x6 C7 v
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 N$ h* v) n. n% v7 K- E% `
+ ]" J' [, I: y' p. i& |0 W      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
) Z$ y: Y7 y& w8 C- H4 w- Harm-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。
% t4 b# p% n: v# 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。

3 V+ D, T# I8 C' Z& {7 A9 ]