OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   . K% m6 F! ?2 l6 x
2. /*
   - m* |3 A+ u& c4 X7 H
3. * edma_test.c
   : H7 a( a2 l8 G# F
4. *
   . K7 r4 m, e( i( w1 x& n& e
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   , X" |% U) p2 [) L7 I9 J1 D/ Q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 w* q: A2 @; _& y! a
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ( |0 {0 ?3 `, M3 G  a, D  x& O
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    0 p& |8 Z) e2 p. m
14. *
    ) X) c3 @4 a, {3 w$ _/ k( s% d  I; S. e
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
    
17. * published by the Free Software Foundation version 2.
    : m$ L8 z" d' A! N6 |
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ( L. p8 u6 B- B! O( d. K) K* ~
20. * kind, whether express or implied; without even the implied warranty
    6 H' w0 i* T% x0 N% f  L
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    8 L% e+ J$ i  [8 |: n
22. * GNU General Public License for more details.
    
23. */
    
24. 
    : X% Q" A' N, q" P8 ~/ B& V
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    9 _% H3 o" N( p# P/ T
27. #include <linux/errno.h>
    4 Q5 O- ]' Q6 h& Z+ ]4 ~
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 f8 B# o/ k1 m4 s) k
30. #include <asm/io.h>
    ! j. w9 F  p( h, H0 `
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    9 q1 r5 E. T: X
33. #include <linux/mm.h>
    5 S! q  {$ w3 l9 @
34. #include <linux/dma-mapping.h>
    - A; V# \5 h1 q- ^! N
35. 
    * ], d$ S# y! v0 t7 D. v: u7 H
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 ]+ Q3 [) \. a& x7 A: p# r& U$ a2 W
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    7 w) x+ t8 y1 R8 Z# m, Z7 i* j
43. 
    
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__)
    7 F" p. |1 {* Y. a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    4 T6 N# _2 P( x# a; G5 p: l
49. #define DMA_PRINTK( x... )
    # q+ Y  L# w. P7 c% f& o% f: L
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    * D4 T! C+ }9 E7 L/ Y9 R" a+ I
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ; I" L' i! k" N- Z% u6 i
56. #define TCINTEN_SHIFT               20
    & f% D: W. D! G! e5 F
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    2 y5 G) ^# S5 c$ T/ G) d( t) S
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    6 Q0 c9 _) O: E* M% _7 |4 E* P
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 o* y: O; m: ?6 O" Z+ u
70. dma_addr_t dmaphysdest1 = 0;
    ' m3 ?3 H1 e; E
71. dma_addr_t dmaphysdest2 = 0;
    1 a: q- Y, I0 I8 q& ]
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    % \: W# V0 G0 c3 `2 z: a+ W2 Z, R
78. static int acnt = 512;
    
79. static int bcnt = 8;
      h; @1 G) O& `- \8 o% h7 k: V) f4 D
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    7 z5 ?" G9 b& z6 ^; C& E* {  b) h
83. module_param(bcnt, int, S_IRUGO);
    # m+ R4 d0 c8 I
84. module_param(ccnt, int, S_IRUGO);

复制代码

3 w( p6 h5 m7 q* i9 t0 k+ p      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
) h& O2 q9 T/ e: H: E- larm-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。
5 ^" r  Z/ g- I6 q. 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。
7 X( I/ r( C4 S( R" e0 p