OMAPL138如何在Linux下使用EDMA3驱动

yyj

0 e/ Y1 D% b* T' ^  U# N

1. [code]EDMA sample test application
   ! d! W& h3 T8 F9 }: E
2. /*
   $ _9 E0 M$ z7 M* p2 E  L
3. * edma_test.c
   ( _' z7 [$ t" Z
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   . J# w+ o& x1 P
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
    ) W; K3 E) K& A' K" ~
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    0 ?  e; T  B- e4 j4 M* n& u
15. * This program is free software; you can redistribute it and/or
    1 w0 k1 |. O6 p' p! ?- d0 r* ~
16. * modify it under the terms of the GNU General Public License as
    * q" Y3 y/ r, \: ~- z  ]
17. * published by the Free Software Foundation version 2.
    5 ~5 U$ ]7 r1 k' [- {( ~7 @
18. *
    . F7 z. d# V6 @3 f* s; @
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 J% U# ?, F7 {% D% K7 U: T
20. * kind, whether express or implied; without even the implied warranty
    ; t6 k1 C, }: ~  B$ f0 h
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    . k; X# }2 Y# U+ ^7 c/ d+ W
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    7 |7 U, A- K2 y' o( [
27. #include <linux/errno.h>
    # G1 x0 [5 t9 y( b/ m
28. #include <linux/types.h>
    5 g( Q7 H1 x. c3 t
29. #include <linux/interrupt.h>
      k0 i/ e9 P4 I8 c# r
30. #include <asm/io.h>
    * {! C8 h* E% O6 `& c/ ]/ p
31. #include <linux/moduleparam.h>
    6 J. e. |  b# ]% Y6 c, J
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    , e4 p: c1 e* d$ I. v: o' J
34. #include <linux/dma-mapping.h>
    
35. 
      W+ A8 e' Y$ z# o# L* r* a
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
      g$ q. c. m/ W
38. #include <mach/irqs.h>
    ; F6 c& \. v3 u1 u" C
39. #include <asm/hardware/edma.h>
    
40. 
    1 N3 w' q' U4 \" ]
41. #undef EDMA3_DEBUG
    9 H% t9 f( ]1 ?& Y8 R4 h9 P
42. /*#define EDMA3_DEBUG*/
    
43. 
    ' ~% x' [7 g0 W5 E+ b! v
44. #ifdef EDMA3_DEBUG
    / g: v& l1 Y! `, `, I* g
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    2 C( u) J& m+ ~0 ^4 ]6 b) h# W
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    4 b* F, N$ p. j
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 S0 h- J( r# O" T
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    0 M9 O2 w! M. [3 K( T" U1 `; P# w
52. #endif
    8 ~0 W, y* Q& l
53. 
    ; z& [) P' S$ B2 q
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 h" L) _; o1 X. }: w
55. #define STATIC_SHIFT                3
    5 _3 Q7 Q& v! ?. ~
56. #define TCINTEN_SHIFT               20
    9 G. O1 a* \0 }9 [1 h) q, d
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ) \/ S" Z( O; P% K
60. 
    
61. static volatile int irqraised1 = 0;
    % T& @# `, o, v# T
62. static volatile int irqraised2 = 0;
    
63. 
    * m; P  j  H! z6 N' A, E
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;
    ( i6 f, A, F; \5 s+ e
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    4 P# t# O( D5 Q1 E; Y! V
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    : j: T; o% c, X' h+ u
73. char *dmabufsrc1 = NULL;
    4 q0 m% x5 i1 J: K& G  j# l; m4 }
74. char *dmabufsrc2 = NULL;
      T& r/ f! [; O/ }: U
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    1 A' y( \: A% Q$ |1 z
77. 
    6 v* }. l1 m6 p% z) N5 X
78. static int acnt = 512;
    6 ?$ O+ }$ I, M( \
79. static int bcnt = 8;
    ! T8 p' E5 Y. f+ F- c
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

- c, ]' m& r# }5 S9 n# w
      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
9 I( M, ]' x/ h0 N- J5 W* Harm-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。
' v9 H5 l0 m6 g
% P) [% T% X) G