OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ G( x8 G1 @" P6 |* j

1. [code]EDMA sample test application
   $ J# ~$ Y+ `" U- M1 w
2. /*
   
3. * edma_test.c
   
4. *
   9 Y/ K6 g- \+ g! _
5. * brief  EDMA3 Test Application
   - F* w/ L+ ~) h
6. *
     O- I/ u/ G% l+ v
7. *   This file contains EDMA3 Test code.
   / f" v7 m" j3 r! a/ ?: [
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.
    + m# Z- g2 ?  X% r# H
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
    
16. * modify it under the terms of the GNU General Public License as
    9 F9 A) d% z8 B1 w/ Y" O5 q  W
17. * published by the Free Software Foundation version 2.
    8 `/ E8 J% ^* p. m4 @
18. *
    & I, ]& S6 Y5 F% r9 d- b: W
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    6 w3 T9 s) Z5 y. J: N' a" Y
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " p& |' W4 P+ G% ^% G* j
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ! d+ y, B: Z  l2 j" d  Y. c
25. #include <linux/module.h>
    * L. b# E* m( M. p
26. #include <linux/init.h>
    " m5 g; m- n4 e1 T! 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>
    
33. #include <linux/mm.h>
    ; i$ E  E  w( N6 A2 @# V2 C3 I
34. #include <linux/dma-mapping.h>
    % O, I7 N& }1 S2 r$ B9 Z- h
35. 
    
36. #include <mach/memory.h>
    4 Q6 ]4 j/ ~( S  s2 n
37. #include <mach/hardware.h>
    7 {, x' y$ k* I  z) p* k" U. U
38. #include <mach/irqs.h>
    ( C- Z0 Y. k, m! G
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    6 v0 `, F. Z1 y. R- J0 l& C1 R) g
42. /*#define EDMA3_DEBUG*/
    
43. 
    8 B$ c8 Q* [6 o' @# c' F
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    * `5 s$ ?; a  e8 q
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    : L% Z' M) R* _' h( M/ [& ~! w: t
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    3 G( Z2 G7 l$ y" R/ g$ @7 \  m( j
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # P' W; g  [; j& d+ B- P
56. #define TCINTEN_SHIFT               20
    5 A3 ~7 m0 K+ M# d  {' u
57. #define ITCINTEN_SHIFT              21
    / ?# w- w- B9 b; b& `
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ) u* O! \! ?* r4 V# C3 C
61. static volatile int irqraised1 = 0;
    9 l+ b& a2 [" ~+ |* q" t
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);
    % x1 }9 ?8 D6 P0 ^# l
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * ~% O3 m9 G2 r6 C
67. 
    ' @0 Q% a# v8 x6 @
68. dma_addr_t dmaphyssrc1 = 0;
    1 {! H$ T+ m  U: O
69. dma_addr_t dmaphyssrc2 = 0;
      C# _% l6 M$ U
70. dma_addr_t dmaphysdest1 = 0;
    ' r, _( d* N9 J* L. }
71. dma_addr_t dmaphysdest2 = 0;
    # @$ X& K7 I+ C# I3 u
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ! X' j  [9 T4 S9 V
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    % B* r( M3 j. v% r2 _
78. static int acnt = 512;
    6 {( W4 B3 L4 Z  j5 C. v4 L
79. static int bcnt = 8;
    . v: `; ]. @# T, b5 k
80. static int ccnt = 8;
      W/ ?3 Q' m" L
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 ^; n+ U/ N9 c" ~4 X& a
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

2 y( S; }0 O+ j  W* ?! w9 S1 ?      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
1 m1 M" ?0 c$ j. ?, a+ ^9 marm-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。
* |4 Y  e# |; c* Q     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

* o' x' R* I9 A; S4 V6 Z( I( x. c
& a, w8 @2 h" o