OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ o: @+ S& S$ R, p- R

1. [code]EDMA sample test application
   
2. /*
   8 q- `+ |* e" D* S% b
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   % B1 u' F% T, n) l0 u; S
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   8 H, q2 f$ y! Z) c/ s6 P4 ^5 d
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! n; `( Z- B5 u7 `
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    # ^" v& U' c; L2 D2 x% Q
11. *         TO CHANGE.
    * F- g, r$ G; x1 M( V$ [4 @' b
12. *
    ' y' \5 V( _. ~9 o
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
    3 U7 ~& X4 I% A( S
17. * published by the Free Software Foundation version 2.
    & C4 a) d$ g1 ?5 E
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! g& o  S4 @9 z
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    4 o1 N( A9 C7 h9 X
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    + o6 J& U9 G+ Z4 o8 {, N
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    3 j0 k. {) R6 k* |# _. k  ?
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 P! v4 V) N1 D8 a3 t# K
33. #include <linux/mm.h>
    - W9 J/ Z$ b( F: K+ H4 H
34. #include <linux/dma-mapping.h>
    # W+ |8 M4 Q1 `: r2 n( ?" V! O
35. 
    - f6 _4 o- x$ T. x
36. #include <mach/memory.h>
    ) H$ g; h0 Q- g" H5 e
37. #include <mach/hardware.h>
    : h, N" x8 X# S0 @$ |8 Q
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    * D* H" U6 ]4 a9 Y' P! ~! c
40. 
      q& |# r% Y. T) U- M6 Z
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    " J# S( `) C& l$ M/ W
43. 
    ; a% p. N. K# x* Q+ A8 ]9 F
44. #ifdef EDMA3_DEBUG
    ( P+ a% J  d8 T. S3 E, P
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    5 r- |  }7 k3 X! g' z, b5 d! H9 _- U! s
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
    5 q9 ?6 Y9 o- o' |: S7 H5 M
49. #define DMA_PRINTK( x... )
    * k+ B5 G, j4 S( d) W# Q$ W/ ?
50. #define DMA_FN_IN
    7 f. c9 K2 F; |; \# ~5 d+ O' Y* G
51. #define DMA_FN_OUT
    
52. #endif
    , ?/ X# S5 @7 @. a6 }, G% h: {
53. 
    % b' D1 y- f( C  X
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    $ O$ V  A8 }0 q9 a1 M
55. #define STATIC_SHIFT                3
    9 t2 ?: X4 R) A
56. #define TCINTEN_SHIFT               20
    ( ~" u6 s0 M+ ~5 N
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    8 ^" M$ r. G; p, i0 S- G% J
63. 
    ( T7 t0 _5 M/ I' E) n
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. 
    & f* k- K7 z+ p  z# p
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 G) B  q7 n0 [- g& I
70. dma_addr_t dmaphysdest1 = 0;
    3 h$ H. m* s( w- h! M
71. dma_addr_t dmaphysdest2 = 0;
    1 P0 q2 O- `4 H. E& C
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    3 A/ U! n6 u7 D$ d( F1 [5 |" }
76. char *dmabufdest2 = NULL;
    - x9 J' d& W' w( h9 x! {5 j. I; I
77. 
    
78. static int acnt = 512;
    - g$ m$ l; F6 c& C, C
79. static int bcnt = 8;
    $ f" H2 M- i2 ], T  A2 P
80. static int ccnt = 8;
    - N9 j9 Y) e6 ~, k
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

/ d; i) x* O6 Q) d
      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
  \- u- G3 `, D) \& C, d- rarm-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。
+ N/ y( {  E: ]% R4 b* g+ ]5 p  g     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" C* B5 ]2 @# F; s  G5 R
2 X& c$ T$ ~# X4 ?8 P