OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   / G& {) Q" M/ L! e  X
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   2 G' f) V* J5 d: f% f
7. *   This file contains EDMA3 Test code.
   
8. *
   & M, _. j, P! t: Y8 c& d
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   : A( {3 B2 K+ j& K! u8 S& F
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    6 n! t  {0 J& e- p/ A  U! `2 V
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
    3 r) A# X1 q0 V% P
16. * modify it under the terms of the GNU General Public License as
    " S6 B, C) u+ O& O$ f
17. * published by the Free Software Foundation version 2.
    ' v) E5 X4 P/ k( v+ L( E
18. *
    . g6 o, Q0 c3 V6 ~
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ) y' @% @% ?! X  @) U' Y
20. * kind, whether express or implied; without even the implied warranty
    ) x6 }% c' x; p2 r2 X4 d9 ]
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    " Z( J/ m$ H2 N9 ~) M5 {4 x) N
23. */
    
24. 
    * R" y. w; i+ D  K( N8 s
25. #include <linux/module.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>
    6 x) u3 D/ \/ [4 P% r9 K
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    - F# D% Z4 j3 ^/ M$ j2 `
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      I& ^. Q7 {4 b' K, W: g5 {$ p1 Z& z
35. 
    + s- `4 ?6 ?! _5 \
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ' K' D9 B2 `! }, y3 V2 s. W
39. #include <asm/hardware/edma.h>
    . k9 S$ J6 I  F
40. 
    5 Q, R; Q! `1 K9 d" s* G! U
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    % M/ V, }: f1 }: {/ j
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    0 q- M% Q9 R' L% {8 f
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . a- ^, G. F% ^# j
48. #else
    3 H+ {3 l5 Z( I3 _2 N9 z
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    6 v8 F: ?- z2 F
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " `' \- u3 k8 s7 Q
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    & F1 g0 [; n# G4 S6 `) @
57. #define ITCINTEN_SHIFT              21
    ( s. I" J9 @% y0 u6 F% f
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    4 \4 S" Z5 h, e! V0 m* W. \& n7 D
61. static volatile int irqraised1 = 0;
    3 N9 `3 Z& y, l, c
62. static volatile int irqraised2 = 0;
    
63. 
    
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. 
    + J% r/ _0 k" \' E9 e/ u
68. dma_addr_t dmaphyssrc1 = 0;
    # z+ r( o# U2 ^4 b
69. dma_addr_t dmaphyssrc2 = 0;
    4 B) R. B! c8 e9 p
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
      f& l+ }8 A* u. |$ M" S( r/ g
74. char *dmabufsrc2 = NULL;
    ; m% k4 y" ?+ T5 X2 P! M2 s, F5 S
75. char *dmabufdest1 = NULL;
    3 J+ _, Z4 _+ P" i8 W' Z# Y$ b
76. char *dmabufdest2 = NULL;
    ' O% I, f# f) t  L7 t, ?2 c; o) d0 r8 h2 Y
77. 
    
78. static int acnt = 512;
    ! W  ?4 S. n: c% M( w6 o
79. static int bcnt = 8;
    5 J! `  G  B8 x
80. static int ccnt = 8;
    
81. 
    . L6 x* l, P5 E# {  N7 a7 p1 P
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    % r( g9 E) Y# c
84. module_param(ccnt, int, S_IRUGO);

复制代码

# E6 N7 R9 w. c) E) ~+ ~
% o' u+ E+ @. |5 p0 O      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。
$ h7 k# x3 T* ~, T/ `0 Y- ~
0 o% N  ]  z& H, K