OMAPL138如何在Linux下使用EDMA3驱动

yyj

. h0 k7 Y/ d. H' f1 M/ W

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   4 U' R& y0 G6 o( t' T% |
4. *
   1 `  }. I& G) k7 ^' J* _
5. * brief  EDMA3 Test Application
   5 |3 r' ^9 P# }6 n1 j; S- |7 v. M
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ' c) a7 D) a+ n: n) k6 Z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    & \" T+ u  u6 s+ S- g& z) i
11. *         TO CHANGE.
    
12. *
    9 j: _5 ]2 Q8 F/ A7 S/ Z2 H7 s$ s
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + H, B% M9 P, U# `
14. *
    / }: @% N( Z6 U9 ^" F0 J* K3 `1 K
15. * This program is free software; you can redistribute it and/or
    : _' i. ?5 q0 L% x% N
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ' e( ]4 a4 E; m; b+ a+ K  i. s
18. *
    , e: h5 j9 ~3 m! c( w
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! a3 e$ R* C. D6 f
20. * kind, whether express or implied; without even the implied warranty
    * y! u' s( t) [/ @& w0 N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      e2 j, D& m" l/ ?9 X' }) c
22. * GNU General Public License for more details.
    ' }% \* s' T+ k" W
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    1 u, H6 U  A. ~0 q/ Q9 C' I
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    3 c; T5 X7 v/ Q2 K& N0 E# |: T2 z( D
32. #include <linux/sysctl.h>
    ) o+ ^( ?" u+ J9 V" K/ o9 |
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      q! w. }% Q" E
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    & m8 D& V! H& Y4 m
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    6 \) D6 y5 v3 a+ s
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    3 G$ S% }9 Q9 l7 E
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    4 y* Z; p) {- J; b3 F
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... )
    0 h) I* {7 I7 D" b" x& }* ^
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
      b2 k+ C9 w5 i" G
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    . O+ p1 n- p& b& D0 o: F# ?% B0 q2 ]
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    $ s& W! ]- ~( [5 t
58. #define TCCHEN_SHIFT                22
    ( b: U7 _6 A, K9 v
59. #define ITCCHEN_SHIFT               23
    5 H, `' _) T  |
60. 
    % H" F# M$ s  ?4 R( [
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);
    / f9 m* Q& q4 S5 c' [) I9 s% }
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . P6 a# l& V  A; f$ Z
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    6 ]$ f/ ?8 O+ g+ N2 n  C' N1 |: }
69. dma_addr_t dmaphyssrc2 = 0;
    9 J+ A% Z# T' F$ H# y1 E
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    , z0 M2 A; {2 d! k( D
73. char *dmabufsrc1 = NULL;
    . |+ H0 z  n; Q# n; K" j  g
74. char *dmabufsrc2 = NULL;
    ) I$ K8 F9 c& g/ F
75. char *dmabufdest1 = NULL;
    " |- g4 |4 ^( }- w/ Q
76. char *dmabufdest2 = NULL;
    
77. 
    & G0 A( ]9 ]! [3 `% W; E2 G
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    * B- E' {# Z" u5 y1 F
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    . K3 e! m- t2 D! g: J! `3 l
84. module_param(ccnt, int, S_IRUGO);

复制代码

. P- z" v& h. u7 S7 S$ ?5 a9 P      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; Q$ e  a( D! Harm-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。
* j5 ~2 H/ c* j* y3 s% [7 [2 h

/ f9 _& V( z6 P0 y' b9 q" Y: K/ V