OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   $ N, c8 C1 Y$ [0 u- m
4. *
   ! O! V$ e) X, k0 b6 ?2 k
5. * brief  EDMA3 Test Application
   : N" g. g- q. l6 i0 ~# l
6. *
   
7. *   This file contains EDMA3 Test code.
   
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
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % _, j2 L# z( H: ?# V9 C) i) j9 h
15. * This program is free software; you can redistribute it and/or
    ; b. P) z$ ?' l; z, h
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ; J& ^7 p6 D5 m% j9 o
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      |) V9 H& ?. k( G6 Q  s
20. * kind, whether express or implied; without even the implied warranty
    7 @9 W$ j. e$ u& U1 S3 J: r
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # s' X/ Q) k5 r. V8 g" H) ~( N0 K1 V
22. * GNU General Public License for more details.
    
23. */
    
24. 
    * ?0 }* P7 j- Y$ N6 |6 Y/ z
25. #include <linux/module.h>
      ^8 k5 q8 g$ v) u* M
26. #include <linux/init.h>
    - k/ h/ W$ e) c+ C( U5 R
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ) v5 W+ B: H* F1 C- a- Q
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    6 M) ?5 O- \8 s; }, W
37. #include <mach/hardware.h>
    . A. [; p$ E7 L( @: N3 ^! L
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    & V. F+ z# u( k
42. /*#define EDMA3_DEBUG*/
    ! p7 E! c% y$ ?$ M. y' D
43. 
    " G# I5 Y$ R) M$ `$ w* v  a
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    8 |# _% u4 K! w; O4 Z1 l- Y$ h
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    * _# o' R; M, K; p
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 Y# e) I  h- r4 v) {
48. #else
    4 V4 r0 _1 v- S5 r: y7 l) \* q. i" u7 b
49. #define DMA_PRINTK( x... )
    % j3 \$ t. S, R6 r5 y
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    % a  C; w6 B5 ?, i" G  X
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    : c: R; A' t( ~5 f. R6 w$ g
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    # a0 W! v; W1 f% S* m
57. #define ITCINTEN_SHIFT              21
    2 p& `( O/ R# J, w
58. #define TCCHEN_SHIFT                22
    ) D% e$ q7 s% d3 A
59. #define ITCCHEN_SHIFT               23
    
60. 
    7 p( a9 H  t  c# i' c' k! d, g1 k
61. static volatile int irqraised1 = 0;
    : M2 j$ {3 x: y6 U! d+ T
62. static volatile int irqraised2 = 0;
    : ?* d; L) b! v) ]' z$ J2 N7 Y
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / t! b- v  ~) r1 U* j2 b. V
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);
    " p1 d6 K( T( n
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
      ?2 p3 }& t2 F5 o
69. dma_addr_t dmaphyssrc2 = 0;
    4 j' K  N. Y" V
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    1 z! A6 ?9 ~2 N9 b2 r  F
72. 
    " G- L' x+ V" N) m) y% h
73. char *dmabufsrc1 = NULL;
    * x- U+ N& k" V9 E
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    * D) a4 j2 V/ ]" k5 e
83. module_param(bcnt, int, S_IRUGO);
    ' M: J+ C9 U% C
84. module_param(ccnt, int, S_IRUGO);

复制代码

/ A* s! t& p1 b+ S, u/ C. k) c
! @; b" b9 b  U+ o1 C% G$ R% l, 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
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。
* w: I+ A0 j4 M# H( R/ [* `# U5 X     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. m* {; ?4 O, [' ^
6 \, X) d% b- O/ j& s7 U8 o7 R3 l- K
* @! X2 u2 @# C. m0 }$ P6 f