OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
     C* Y" l& k  z; Y: n! u9 s
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   " B! A; u, D) [3 u: |: [
6. *
   " P; P$ J5 |/ l9 ~5 v* K4 Q. e% [
7. *   This file contains EDMA3 Test code.
   : {4 g! C1 X0 \* o. |7 V
8. *
   : D: G8 }& i, A- y: n
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
    , D4 ?6 x+ y$ e7 N0 ]5 v
11. *         TO CHANGE.
    2 L9 Z. |: r: p& O8 M2 s9 t# o- h9 [
12. *
    7 _) n0 S% @' j! _  X: X
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    1 ]% Y% m9 T" K- |% j; ]. l6 V
14. *
    # ~# [- R  H- x* L" L, F
15. * This program is free software; you can redistribute it and/or
    / [: [" Z. o" k, N  o5 |+ r
16. * modify it under the terms of the GNU General Public License as
    ) K$ O4 f/ w! f3 K) c% g" t
17. * published by the Free Software Foundation version 2.
    9 \5 j" h7 S  p+ S4 S3 U7 @$ `
18. *
    . g, L* u; Q: i9 X: Y1 Q" X3 {
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ; u, o6 m1 q% T& v: G. Q
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    - C. M6 t! v) [8 r0 [) f
23. */
    
24. 
    $ W* o' [. R# t% z$ `
25. #include <linux/module.h>
      o+ T4 \' ]9 ~( b
26. #include <linux/init.h>
    ! J. u0 Y9 O/ h" {8 k7 D8 o+ J7 l
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ) q; p3 h) {. `$ Y) k
29. #include <linux/interrupt.h>
    ! S6 t- k" h5 m1 q- x8 `- f
30. #include <asm/io.h>
      q' d* z/ q8 X" U$ l1 q# K) b
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    " b5 w9 C4 I: Y, A8 s9 u' v
33. #include <linux/mm.h>
    % ?) _* d4 R6 W  t+ l
34. #include <linux/dma-mapping.h>
    + W+ Y8 T7 V: d4 L) t  e* X# G
35. 
    5 o/ i: r# X) I) j6 J( [0 }
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ( f4 B# \. M3 Y5 Z5 p) K
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    7 w  G+ ]2 F( N5 z* Y7 M
40. 
    
41. #undef EDMA3_DEBUG
    7 b  ^- f; j( p
42. /*#define EDMA3_DEBUG*/
    
43. 
    * h- Q& _0 h) y* W
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( T5 G. c* ~' P& d) q- N* T
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    $ e+ x$ b% D1 P" p, t8 F) r
49. #define DMA_PRINTK( x... )
    + U& F( S; l( r: v' `4 I
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    . ?% R5 x3 s/ i0 B  Y8 V6 w9 z% x
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    . o7 L2 D5 R  S6 |: f( J+ C( e
56. #define TCINTEN_SHIFT               20
    " J! F( s+ s  b
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    0 y9 S. u$ B1 m# f1 s
60. 
    1 m& `, _' `* q+ T4 w1 A
61. static volatile int irqraised1 = 0;
    2 A" X4 t! X% y. g" H
62. static volatile int irqraised2 = 0;
    
63. 
    # |% T, i% f/ ]/ \" e
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);
    1 y6 u7 p" C8 I
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' U. b* a9 P" g) h. ~+ |5 S
67. 
    ) H8 _1 z; Q; k4 o; W3 L
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    9 E, b( p2 d" j* H
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    9 K/ Z2 Q" U7 N# [/ A
72. 
      K% |3 c- X/ }) @9 c3 ~8 F$ ~
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    * I2 M; q7 ]" k
79. static int bcnt = 8;
    4 ^2 g" a( |% _) q
80. static int ccnt = 8;
    
81. 
    $ K' k. Q! u8 B$ E4 z
82. module_param(acnt, int, S_IRUGO);
      H4 U8 ~$ h" h( T- w
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。
  ~$ d9 W0 b4 F; ~5 V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


) U8 Y- e" N4 p  K: O+ h- h, U. F