OMAPL138如何在Linux下使用EDMA3驱动

yyj

2 x8 k% m- k2 L4 E; s) p

1. [code]EDMA sample test application
   , @+ o2 w& w: C5 y& C4 w/ K' j
2. /*
   ! ^6 w( k: c  N2 w
3. * edma_test.c
   
4. *
   : k1 i$ r' f0 A. f/ ~" h
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   + Y* c4 p4 Z' g6 T3 ^# j
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
    9 h9 Y! Y! [* q8 B  R: _$ g* N2 D
11. *         TO CHANGE.
    6 j' G7 t& l, A* H
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & b( l4 z4 D7 y9 K. Y* i% _# f- ~/ P& K
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 ?0 O. i+ [: J% }
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.
    
23. */
    
24. 
    8 q6 {6 A+ M4 P3 n4 Q0 d
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , a& Z- K2 B# _( w3 s) I! A; H* x
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    6 V2 ]( }& H* D/ F
31. #include <linux/moduleparam.h>
    % d* M1 i# P  j) Z3 d) m
32. #include <linux/sysctl.h>
    5 g4 l+ {7 u0 F. B
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    , B' `' b) A- A9 P. O  J" ~& }6 o
35. 
    6 r% I- G$ K, f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    " T9 }0 |; s! P
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    " P/ @) z' C& z. ?+ U* e" F
41. #undef EDMA3_DEBUG
    5 M; C# ~" A3 w1 P$ z2 @! a6 g
42. /*#define EDMA3_DEBUG*/
    2 P" ^$ C( S+ R2 }, |
43. 
    
44. #ifdef EDMA3_DEBUG
    0 u; m( Z" n1 O
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    . j+ ]; b) h: s" P, Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    9 R8 @/ {8 N2 [( _
49. #define DMA_PRINTK( x... )
    5 X  L; E# O" P% X5 L% w. K9 Q6 _
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    / @2 r  n) S! l: ~8 a/ V/ R; }
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    8 A; ?) I5 k. z( v: p2 h
60. 
    
61. static volatile int irqraised1 = 0;
    
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);
    - |3 G; f6 k7 T" b3 b& A
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    + A# X7 X0 U2 t. H
69. dma_addr_t dmaphyssrc2 = 0;
    3 ?' r& ?6 N/ D" i* Q
70. dma_addr_t dmaphysdest1 = 0;
    9 p/ ^7 C& P3 {
71. dma_addr_t dmaphysdest2 = 0;
    5 Q! H+ Z1 G" t: N0 i# }2 F
72. 
    2 s: I2 B4 @6 r" g: Z" C! y
73. char *dmabufsrc1 = NULL;
    5 U8 Y. X* t, t5 z' t) p0 E
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    5 ]8 o& t) g) n+ i8 M! `# ?" p
76. char *dmabufdest2 = NULL;
    3 X# w1 N. H9 n
77. 
    2 Z$ i9 L5 K% Z; z- V
78. static int acnt = 512;
    
79. static int bcnt = 8;
    1 ~/ a9 d) N  s' L
80. static int ccnt = 8;
      U* ]% J2 {* D" S/ r' A
81. 
    1 t9 q) u0 O' E7 Z! @0 H
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! ^1 j, K( N
      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。
$ ~! f9 {& D; g4 C% P     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

& e4 Y$ b0 F4 W0 j& m