OMAPL138如何在Linux下使用EDMA3驱动

yyj

1 Z/ }* W8 b1 C# \

1. [code]EDMA sample test application
   & ]3 V4 c3 e/ z5 P
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ; G1 Y6 U. D  E# I. O, j
6. *
   9 _: Z8 t9 O; F
7. *   This file contains EDMA3 Test code.
   
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
    
11. *         TO CHANGE.
    ' O; x% p; C) m, H  r% K; M: m" M
12. *
    - \7 f  f: V7 E& H
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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.
    ) w( P- @' d- ~4 ^% C9 _
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * o( U$ o! [. ]9 i! C, F2 J
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ) j+ x" [9 e6 Q& m# M4 b
22. * GNU General Public License for more details.
    
23. */
    9 q1 i* n: I# k0 Z/ L
24. 
    
25. #include <linux/module.h>
    ) g4 g% A6 k+ [0 U* Y$ I( \1 x
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    9 M' q; O- o) a# r# U6 a
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 i0 a. k& b8 c- H4 D& f0 k
33. #include <linux/mm.h>
    6 T8 h; o" Y. Z$ n" N
34. #include <linux/dma-mapping.h>
    
35. 
    ( q( x! t* m  Q% w/ O* L8 v0 R
36. #include <mach/memory.h>
    9 \3 X5 |9 E+ A6 v
37. #include <mach/hardware.h>
    # s2 Z- F3 y; q6 @# k
38. #include <mach/irqs.h>
    ' P! Y. B5 y! y$ D
39. #include <asm/hardware/edma.h>
    
40. 
    6 R, ]) C" d1 T. T: N
41. #undef EDMA3_DEBUG
    ) X8 L  i% V  O: D8 S
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    + D8 s# V7 U' H, G/ S/ X' }  ^: [
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
      y. g6 O0 Q5 B& f* o. E3 w
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    2 K* e$ W  @: g
48. #else
    ) {) v+ a7 i+ k" O9 ^1 C
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) W/ G' O! z4 x) D- Z' S
55. #define STATIC_SHIFT                3
    9 T" F& H# y1 q
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    0 m! P3 ?9 g/ x
58. #define TCCHEN_SHIFT                22
    5 @- B" V  F9 C& R
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ' l' ?. z7 x) K4 P# {$ T' n
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : ~' ?: M+ t6 N3 v
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);
    ! x0 D1 W5 o* S* P" J
67. 
    3 K1 a6 |. M/ C& f: i: j1 P$ G1 s% G
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    $ d" N) j& \# W2 }
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
      t. `9 D0 P* y. C
72. 
    ( O  j1 a+ V& \/ X) O
73. char *dmabufsrc1 = NULL;
    6 t5 c: z+ c5 p$ S
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      ?& K$ Z/ E2 U  J2 i: O
76. char *dmabufdest2 = NULL;
    1 }/ H7 a2 {) [6 o1 h: X: W
77. 
    
78. static int acnt = 512;
    * ]8 G5 k# j. W# _1 Y; x
79. static int bcnt = 8;
    # b* k! V2 w7 B6 m0 D6 `
80. static int ccnt = 8;
    
81. 
    " R+ n( k7 {2 R0 T
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

# Y2 q9 i. g% [/ I      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。
. n# @- ~, u1 m0 ~* ?     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 T- u$ P/ X& w# p) D( ~  }