OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ) {+ z; M0 o* b3 n4 @
2. /*
   $ u; U& r1 S7 q) F
3. * edma_test.c
   : A0 A1 w( G. S% v! T
4. *
     F4 P' ?6 S1 y
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   6 ^' P  g$ Z* Q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , I& p! I# R' n! r  o
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    1 F2 L# F$ B* R' G% q; G& j, J3 e6 k4 g
11. *         TO CHANGE.
    5 n6 k4 y; ?- K& J+ [5 G0 }6 ?
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 H2 t! o# m( L7 C
14. *
    
15. * This program is free software; you can redistribute it and/or
    & n- H% G. g( a, J5 @1 I0 D
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    $ K% K. m& U8 l. ]. `3 p
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 ~' p( I0 X% N( Z  x4 i5 d6 p
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ; H0 I0 N, u; R# F, R2 |) e
23. */
    
24. 
    
25. #include <linux/module.h>
      f2 E, p8 C/ V( D5 L
26. #include <linux/init.h>
    3 P7 E  z! [: G
27. #include <linux/errno.h>
    9 t7 Q) z! R! U3 e0 u# Y; G
28. #include <linux/types.h>
    2 N0 K# f# j; ?* B& x6 z3 H3 `; s. w
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    " ]  p' g  x! V) o* P/ x
31. #include <linux/moduleparam.h>
    ; o! ~+ i. ^  F+ Z
32. #include <linux/sysctl.h>
    + z( N! D* h. B7 w% b! h
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    8 Z+ B# J2 Z6 b( o
35. 
    ; P  N, {$ X+ U
36. #include <mach/memory.h>
    8 ?$ T/ \" U# H2 G% P# m- u5 E
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    . K! q% [3 D9 O# z7 ^7 T
40. 
    % @0 F/ k$ G- r* |, C0 E( D& ]
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 ~6 k4 p1 h8 d  z( l; }
43. 
    ) A5 k- q' `6 p  a: s  @
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # D+ _9 C6 V, Y1 V
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; D5 z2 J; W- C; u
48. #else
    ' H6 `; x: q, ?
49. #define DMA_PRINTK( x... )
    . [( T! j  |: U% Q! Y. H: E
50. #define DMA_FN_IN
    # [3 x  m1 ]+ V5 ?+ @% y7 U
51. #define DMA_FN_OUT
    ) Z+ Z+ |& Y* ]4 L& ^% V
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    7 U& m# c6 s2 y
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    , w" b$ h( u5 K; w9 J8 d
62. static volatile int irqraised2 = 0;
    
63. 
    4 h/ V% H4 r& k* X
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ! C# o4 U0 x6 C3 A
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & F9 [( K0 V. P( o, s1 {
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & j7 \# ?0 P' F1 k
67. 
    : ]' d0 {( x4 t1 l1 t! _) v
68. dma_addr_t dmaphyssrc1 = 0;
    9 t/ t. l' Y% ~" H9 F
69. dma_addr_t dmaphyssrc2 = 0;
    ) G! ]; h* ^+ s
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    + g$ _) B  R8 o7 X' o& I+ G
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , u" |9 ?- i9 U: J7 B( X
75. char *dmabufdest1 = NULL;
    9 _* }# U7 [: m, S7 `
76. char *dmabufdest2 = NULL;
    6 r% W3 ]% v' g. k1 m1 D8 l
77. 
    / x4 U( r  l2 ^$ f  P
78. static int acnt = 512;
    
79. static int bcnt = 8;
      }) q' ~7 {+ j: _8 y- r+ R
80. static int ccnt = 8;
    . e7 ]# J2 v7 o9 p3 q, Z) A/ q" B; n
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 b+ H. u9 D/ j$ j7 e2 y+ t
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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。
- U5 j  U8 _2 P) [; ?

7 m. G) Z1 g2 U- B; f  `' b& J$ C2 E