OMAPL138如何在Linux下使用EDMA3驱动

yyj

) s) A# @4 ?1 ^4 W9 u

1. [code]EDMA sample test application
   
2. /*
   ! x3 f7 R3 P/ {1 U  ~' B
3. * edma_test.c
   . ~$ j8 Y' r6 m8 B& [
4. *
   & [- e4 \& F. ?2 E+ s; f' L
5. * brief  EDMA3 Test Application
   
6. *
   2 K' r* k) k4 T/ y- `
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   " S7 A8 d- U1 e2 `, ~! ~: x
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    1 L1 B/ Y: o. U( ?: x4 j- e
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ C# Q5 _8 \9 [8 Q
14. *
    
15. * This program is free software; you can redistribute it and/or
    % Z9 s+ }& `6 s! Z: M* Q
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ! a( E$ X7 {( D, F
18. *
    , x$ e! c! f+ R
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    4 T9 \& `5 Y- T5 P: m; a
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . K; S* {+ w8 P; e0 D1 ~. O5 T
22. * GNU General Public License for more details.
    
23. */
    
24. 
    8 F' V3 v5 r( Z  u
25. #include <linux/module.h>
    ; Y& p1 ]% |+ {$ l: y+ ?( d
26. #include <linux/init.h>
    & W3 \) |. d3 |# J; u5 ]
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 `6 @: g. G2 d+ o7 N" g
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ( R& n! [0 s2 c+ B
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    % Q  [0 V; l9 W1 Z' [  ~; A3 A
38. #include <mach/irqs.h>
    ' Y! Y) ?' L3 j3 ^1 c) U2 }7 f1 M  Q
39. #include <asm/hardware/edma.h>
    
40. 
    5 h$ e. z! M, W9 E7 j- R3 a9 ~
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ) X1 i" _( C6 H; w. f9 M
43. 
    
44. #ifdef EDMA3_DEBUG
    3 I. X5 c" V6 u  |1 n
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    9 r( W, E* c! b4 \# A
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    8 ?# G+ a( h9 j" H- P
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    9 C0 L. Y# t! D5 m2 H
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; a) ?2 J. N, D& z
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ; @, `; i% J3 ]1 t
58. #define TCCHEN_SHIFT                22
    ' f- ~4 Z6 A# I  @9 E
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; Y' g& M" T' r3 S& n" P
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ) j% @8 R# Y% {
63. 
    8 A9 [8 D: i% _# T, t
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ) S) W- K& O& u  ?' W1 }0 ?
69. dma_addr_t dmaphyssrc2 = 0;
    ; m0 |4 i- q2 n" k0 o% B* x
70. dma_addr_t dmaphysdest1 = 0;
    6 @: [1 d% ?! @$ j7 ^8 T5 i
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    * d6 _0 Q+ N0 g% x( U$ Y9 E% Z" f
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    4 L, _7 i3 ?+ \
78. static int acnt = 512;
    " U. o2 m: g* S- _. y6 A
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    % Z1 E$ r0 h9 s- N& n6 x
81. 
    0 B3 B  n/ n" C+ k( y' g
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

' o3 P  K# J, P0 H& t  r+ F
      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
$ e+ K  K7 h; j7 V5 Varm-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。
* X. e! v  @; o! ?8 V
( i" g6 i6 K, G' n9 q! o# A, W