OMAPL138如何在Linux下使用EDMA3驱动

yyj

' E; M, i7 {) i# Z( B

1. [code]EDMA sample test application
   7 J, r( Z* A# \" c. ?# u
2. /*
   1 P" P1 t3 q5 Z
3. * edma_test.c
   , o2 d; {# d$ f* B
4. *
   
5. * brief  EDMA3 Test Application
   ! N1 y/ F  \; w* |
6. *
   
7. *   This file contains EDMA3 Test code.
   % `% ]9 N0 P# \5 W' B" {# |, b$ c
8. *
   : d6 V6 |: I- H2 m, q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # _0 T1 X% S3 m3 ?. L8 W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    , ]5 w6 h) c. R. q( s9 r) a
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % ~9 Z2 i- ~- j
15. * This program is free software; you can redistribute it and/or
    $ B7 e9 g9 f+ \; @1 w, n
16. * modify it under the terms of the GNU General Public License as
    - }; l6 H( }: C' B: B
17. * published by the Free Software Foundation version 2.
    
18. *
    & }4 ]  y# J8 F
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 O5 [! v% O, o$ Y4 e, i  }% F: M
20. * kind, whether express or implied; without even the implied warranty
    % z4 W; K1 _4 m; ?0 s8 r4 Z
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 G4 q3 y: H" r- y
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    5 J8 |3 ]& o) W
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    6 L. K! m! [, d. P
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 G# g+ M8 ?0 q! m" N: R' A
33. #include <linux/mm.h>
    4 U" N1 J+ a+ o" s* g
34. #include <linux/dma-mapping.h>
    
35. 
    8 L2 j% G- W! z1 [7 }2 f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , c9 h. Q8 i, Y) Q7 E; I
39. #include <asm/hardware/edma.h>
    $ a+ a7 I* Y$ b& K& n' b
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ! C$ V! h, F1 x7 b# Y4 D
43. 
    6 n5 s  }+ F7 [- K# Q
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    1 F) T  V- s; A* ~
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    # g. |2 c8 ]* s" w/ V: u
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " ]4 l! |4 v- M& o
48. #else
    ' a" U  x, F) ?% ^9 H3 w7 H* G4 m
49. #define DMA_PRINTK( x... )
    & `  K4 b+ h* r7 m! a
50. #define DMA_FN_IN
    * `/ G1 b9 |4 h" J
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    0 R9 S; a1 z8 s; m) B5 y0 Y
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
    6 P7 `; m3 {! g2 ^; l
59. #define ITCCHEN_SHIFT               23
    8 f, V- T9 o5 `6 C
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / ^" K) c! r  Z' Q
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);
    - E$ x+ v: `* I$ `
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
      v& k3 O( _. @) S0 v
69. dma_addr_t dmaphyssrc2 = 0;
    . ^# m3 G* r9 M( D
70. dma_addr_t dmaphysdest1 = 0;
      s9 t& S1 \7 ^" t
71. dma_addr_t dmaphysdest2 = 0;
    7 n2 ^' r  V5 w. J* Q" \7 n2 N" X
72. 
    0 p# s  r! `: Z' f& l& d' h  @$ d6 u
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    2 c, \6 b- h9 D1 T5 T! D% w
77. 
    
78. static int acnt = 512;
    ! g, x9 }7 j' a
79. static int bcnt = 8;
    & A$ P( v2 s6 c# A9 j( f5 C
80. static int ccnt = 8;
    9 `6 H8 X( v9 O7 f6 z7 A% @5 G
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ) b; S8 i1 ?: J1 N1 S6 S: [% L
84. module_param(ccnt, int, S_IRUGO);

复制代码

! P  D# i2 K( Q) }
      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
& v$ \+ d, Y' Z2 F: farm-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。


; b) B* S$ l* b& O