OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 l2 X3 I$ ]. Z; ]: N! ^. `3 B

1. [code]EDMA sample test application
   $ M7 L& I+ ^* W. F, Z
2. /*
   ; ^: Q5 F6 f/ E0 a2 C
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   + I' O$ K( J* T3 e% u8 X
7. *   This file contains EDMA3 Test code.
   1 m0 d- _( R: H
8. *
   " S7 Z" C2 }% {, K; @, C6 E
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.
    2 r; o- r$ J2 b& y& D. N
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      @7 f' `! f+ C* K1 t1 h) X7 q$ j2 r
14. *
    & r# L6 I$ v6 A
15. * This program is free software; you can redistribute it and/or
    1 s7 P4 [" w- O' Y: o2 @6 G" T
16. * modify it under the terms of the GNU General Public License as
    9 m4 v$ k8 Y7 V0 d
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    % m! [. o4 T8 @& t( x. W+ \
20. * kind, whether express or implied; without even the implied warranty
    2 K5 F0 h* I# h& N% [  U" f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    6 b9 f: m: t4 k) A
22. * GNU General Public License for more details.
    $ S6 w+ z+ w% Q" L. ]9 d$ c
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    4 i; h" I; u) e& E8 h: p' F9 Q
27. #include <linux/errno.h>
    $ R) ^/ y, |7 p3 A3 z' v& J. V) H+ z
28. #include <linux/types.h>
    3 j/ t+ M+ C+ G7 F8 L( ?) a
29. #include <linux/interrupt.h>
    , @* V; e0 k) K! L- Q9 N+ R9 n2 W  ^
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    / X  F) s1 q2 h; s- T% ?2 v
32. #include <linux/sysctl.h>
    4 {8 ?1 m2 |" d! i" ~
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    # ~" {- n4 s0 a' z/ g
35. 
    & w7 Q4 H4 @6 B8 C4 |& h# ]+ n
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    # }- H9 C7 ^2 }; Q4 }
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    2 {: B6 R0 u% n1 R- H3 ]
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( e: x+ ]0 j  n1 P! r4 Y% P( H- n
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
    ) h, u7 Y8 n" z- _3 i/ E3 ]7 A
49. #define DMA_PRINTK( x... )
    / ^0 W. B2 x. G. g( u
50. #define DMA_FN_IN
    ! \( Q. F. B3 c7 e% r+ q
51. #define DMA_FN_OUT
      ?' d* g! |  u
52. #endif
    
53. 
    ) S9 H- I: W  Q+ @0 g
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    - k8 ^9 W+ R7 V( u  b3 J
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ; c% X' ~5 o/ K8 w, l
58. #define TCCHEN_SHIFT                22
    - Z. p" D" G! c! S% m
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    5 _# X8 Q1 ?* H! r! M9 E
62. static volatile int irqraised2 = 0;
    
63. 
      n- Z  w2 P  W7 u: k
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);
    7 k; L; ]9 _* M5 `, x9 J
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    ) o: _: ?! ^) B) _& U# k: _9 ^  W
68. dma_addr_t dmaphyssrc1 = 0;
    1 l7 E9 h- J0 d; o) X- D
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - _* H: @8 O8 r9 @, M
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ; v- X. \# t: B* p, v$ n$ d& k3 m
73. char *dmabufsrc1 = NULL;
    1 E' }6 F0 E" G8 f9 n
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) ^  W- @$ s0 K* v7 Z1 g
76. char *dmabufdest2 = NULL;
    
77. 
    & b* _; r: i2 I  {
78. static int acnt = 512;
    * ~# [* V- Y0 @& p1 g9 x. o
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    * }& C1 ~* a7 y* m) ~+ ?
82. module_param(acnt, int, S_IRUGO);
    * Y( |% [5 Z; e1 I% d
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

8 d, E. x  m) `9 N) t7 f. A  g      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) Z: V4 T( |     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。