OMAPL138如何在Linux下使用EDMA3驱动

yyj

# s+ G$ v2 b# H

1. [code]EDMA sample test application
   4 h# M5 K% D4 ^/ P: d
2. /*
   
3. * edma_test.c
   + ^9 |3 \: f. S
4. *
   
5. * brief  EDMA3 Test Application
   1 x" H( |3 E) l' s3 E
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ( ^7 N. ?+ M4 ]* }8 D2 }7 O) H
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.
    + K) u) I0 o- J, {) Q
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
    ( {  F% n/ w/ d; L3 d5 ^, z- k1 R8 T2 ]
16. * modify it under the terms of the GNU General Public License as
    3 b; g* q! H' ^+ B
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    1 [7 b. ^# l& D. F- H, d- @
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    - B2 B, @) ~% @! D% G
22. * GNU General Public License for more details.
    6 l3 x3 u* c; I+ K2 h
23. */
    
24. 
    
25. #include <linux/module.h>
    1 q1 {# V4 C7 ]/ x4 E
26. #include <linux/init.h>
    5 E- y1 r( B3 N9 x% t9 _
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>
    * p2 \8 I' y  `7 Y
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ! m7 ~8 O4 P  i8 ?
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    8 r- S% K' G. R4 l
39. #include <asm/hardware/edma.h>
    
40. 
    5 }& f7 ?  H9 ?- |- r# ~  B. ^
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    9 b5 R# o; \1 }
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    " k$ o. l: o$ I
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" u: `- N6 ~
50. #define DMA_FN_IN
    1 }9 P* Z4 M, O; j, e3 G: e7 ~
51. #define DMA_FN_OUT
    ) l+ O8 l" B, u" `4 y5 ^( D
52. #endif
    8 G$ W& T. [+ {
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    0 k" l. W/ S; A: p& @5 D3 @* c; \
56. #define TCINTEN_SHIFT               20
    : L7 d( v. g4 t! B
57. #define ITCINTEN_SHIFT              21
    ) e7 e4 z  h; F$ j% b9 I# {4 L
58. #define TCCHEN_SHIFT                22
    ( ?) v" E+ n- [5 `% e5 Y5 p
59. #define ITCCHEN_SHIFT               23
    
60. 
    2 H; p  o! u% R/ A% U
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    8 h2 O5 p- ?1 e5 v' i4 o7 W
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 B& G4 |  d! O4 U, z
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " w% t; z* R: F- k
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' ?4 K8 P2 K) z1 o) Y
67. 
    : I- O$ U# R, M. P
68. dma_addr_t dmaphyssrc1 = 0;
    3 u/ M: A' Z/ f! J% z! X
69. dma_addr_t dmaphyssrc2 = 0;
    - \! F- Y& U, |
70. dma_addr_t dmaphysdest1 = 0;
    1 ?% _, X  v. y: V% z' ~
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    % b$ f% w, m# E& y
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    4 U& e' q. A6 @
76. char *dmabufdest2 = NULL;
    ; T" k$ _' Q& N2 {3 P0 R+ D
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 M' j; v" p5 P' L
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    $ i, h; C# Q& n0 e1 A: N
84. module_param(ccnt, int, S_IRUGO);

复制代码

9 r( [/ g4 ]3 W" G: E% }1 G
+ z9 k1 D7 ~) d7 a: \      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。
9 U6 [9 c2 T+ `! }0 B