OMAPL138如何在Linux下使用EDMA3驱动

yyj

( `$ m6 v" _- R8 D( b7 M

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   * g  \1 G+ B- I; n
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
    & K8 K8 J& W3 H! j4 Y/ D" x. `
11. *         TO CHANGE.
    
12. *
    7 M9 U) V% o" p  l* F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    1 y9 {" Q( Z% w( i, P
14. *
    8 C) ?( T: u7 ~! Y" Y
15. * This program is free software; you can redistribute it and/or
    2 b7 D8 `  E: D2 k. y  T7 i" J
16. * modify it under the terms of the GNU General Public License as
      z3 p# r' O1 }4 y+ [, P; F% Q
17. * published by the Free Software Foundation version 2.
    2 ~, ^7 F- H" J4 m
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    $ f, F5 R1 s8 B8 m2 u, w
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    9 g% J- X$ U3 @% \- K% J5 J6 y( S
22. * GNU General Public License for more details.
    & L+ l0 G4 i! t0 s% z, d0 S. A
23. */
    
24. 
    8 _2 n( J( K1 R
25. #include <linux/module.h>
    7 z" a# [- C  j3 Y7 W
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    4 l- U9 T- N9 A  z  T& x
29. #include <linux/interrupt.h>
    ( V9 B, l% |; p/ ?4 X
30. #include <asm/io.h>
    ' A- @6 b& g2 Y
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; Z. V- a$ [3 P$ J
35. 
    
36. #include <mach/memory.h>
    & R* |3 A* ]7 W
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    & p; d& }; m5 b1 u6 z( _) V
39. #include <asm/hardware/edma.h>
    3 i0 \, T/ H# @
40. 
    
41. #undef EDMA3_DEBUG
    ; k& I! u" S6 D& J2 A& c- e: `
42. /*#define EDMA3_DEBUG*/
    9 _! x, S4 W& G- v. x0 a
43. 
    
44. #ifdef EDMA3_DEBUG
    * x& B" Z% {( i- B& R$ r5 P$ v4 G% T% G
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 p8 {! x% I4 Q  M0 s
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    0 d9 p! p/ a+ H+ }; N
48. #else
    
49. #define DMA_PRINTK( x... )
    * e3 W% D+ {$ J: V( o* ]
50. #define DMA_FN_IN
    5 W- Y5 k# b4 ?2 O5 X" h) q
51. #define DMA_FN_OUT
    8 n5 P. R0 m5 k/ A: _% H7 l  `  [
52. #endif
    0 M/ H! b( d0 L- j
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    , ^* a3 Y+ Q9 \7 o% ^
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    * }, T, e4 e5 k) ~$ K9 Z2 M6 u' V' g
57. #define ITCINTEN_SHIFT              21
    " C0 a5 r/ ~" n2 j) i0 Q2 }1 X1 [
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    1 P1 _0 e' n  j
62. static volatile int irqraised2 = 0;
    & \) L* \; S/ P
63. 
    2 N6 T6 J. c0 C
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);
    ! |) ]8 k! p2 k& c$ M
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    . @2 o% f, ?6 u
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    / P- ~4 |! P6 h2 ]1 ^$ M
73. char *dmabufsrc1 = NULL;
    2 n* M5 _5 ~# v% J
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    $ H. N: A7 H, D+ ~) W
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ( _: E" ~& U5 ]& `* M
81. 
    + s8 p' a# i/ m( r1 V, Z8 k! d
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    . o" T. u9 f5 m' [: O( i
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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


6 @7 Z4 p9 F  i# b& n% Q