OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   5 [' ~% G( p" t
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ) v. v3 Z% q) [+ z/ w. x7 ?& 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
      Z) ~3 a! ~% p3 s& f/ f
11. *         TO CHANGE.
    
12. *
    ( n! C  y( \+ p% O) C  u* q' D7 A
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    % j- L' ]: j) v) s* o
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
    
17. * published by the Free Software Foundation version 2.
    # Y. `, S0 J$ `) {" t. B2 h
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    & k& Z! A# J( N! |
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 U* \  O9 u, B( e1 f
22. * GNU General Public License for more details.
    
23. */
    
24. 
    1 @6 M+ z% z# z8 P' Y9 O3 q) }; q
25. #include <linux/module.h>
    % s! q+ `& X! H
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    1 Q, V; G2 G0 d# T/ r% T
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    8 n8 E& S, t, h+ D+ x
34. #include <linux/dma-mapping.h>
    
35. 
    8 O: K2 L* K. t# a$ P, D
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ! J: W) F- T) \& c0 ]
40. 
    5 v. m8 H1 `  W# s( @$ [0 {
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    + q( q3 s0 |  i% l" x4 D) K
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
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
    
49. #define DMA_PRINTK( x... )
    % G+ K' d2 ]' ~
50. #define DMA_FN_IN
    $ d) N3 Z  e- ?2 c1 I2 B
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
      Z; O' P6 D' Q
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    5 x! q; E9 x& O' w& {. b% R- h
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    . }4 a8 g0 U; K$ J" x- d- ]
59. #define ITCCHEN_SHIFT               23
    % S. }+ f% t! Q5 w9 d/ [5 l' {( z
60. 
    : a& ]9 Y  Y) n* w9 z# l) l  c( m0 _
61. static volatile int irqraised1 = 0;
    % G# Z# G4 L! K7 b  v( e
62. static volatile int irqraised2 = 0;
    
63. 
    . N6 }: [' [% c; T  V0 M
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * t) z4 w- x0 o  \! f. t8 j
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);
    ; M3 q  O8 S* o# D& F/ W! D' {( F; c
67. 
    8 x3 g# m* E9 p/ f7 e" L% S
68. dma_addr_t dmaphyssrc1 = 0;
    ) [4 P7 ~) \2 ~2 ?- J' Z, T
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;
    + s! b4 C* ~, l% i. n2 F
75. char *dmabufdest1 = NULL;
    % P7 A: m3 M4 s( V$ G
76. char *dmabufdest2 = NULL;
    % {, A, D; w& f: i
77. 
    ( i6 T* X0 b5 a: H/ h# d
78. static int acnt = 512;
    
79. static int bcnt = 8;
    6 ?/ z: @9 a3 ?: K/ n
80. static int ccnt = 8;
    
81. 
    ( O9 T  Q7 ~6 B! K
82. module_param(acnt, int, S_IRUGO);
    6 v* l1 H- ~) A* i+ c- O- E5 k6 x& G
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

9 z5 T0 `# I  Y5 d( n
      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# P% h6 q8 ~% r# Uarm-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 O8 I) g& j6 ]4 F/ M$ M2 E
* d* s1 j" u+ s: y* T3 X0 F4 |
# j! P( r* y# g" r9 ?