OMAPL138如何在Linux下使用EDMA3驱动

yyj

7 ]3 H; B3 o/ j1 Y6 q/ _

1. [code]EDMA sample test application
   
2. /*
   0 V3 n  w) t$ F$ c# y" X
3. * edma_test.c
   
4. *
   , J2 H; J3 ^/ ^3 o
5. * brief  EDMA3 Test Application
   9 y; S6 M6 v* {  Y- N( b7 u
6. *
   
7. *   This file contains EDMA3 Test code.
   8 N& _- Z4 c  @4 y3 Z
8. *
   % g' `1 g  F+ B3 U! O+ m; J- Z
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! Y& |: }' u  M! G- @
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    . N* [# L; x/ V5 i+ T- m
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    % [0 l3 m( O( G  E, x  w2 C
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
    % @/ M$ \; |5 A, \( \1 t1 i2 a
17. * published by the Free Software Foundation version 2.
    . e+ M2 a! f- R  F4 ~3 s
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    6 @( I) k9 E0 T/ k4 Z
23. */
      P& R- D" p1 `8 x/ }
24. 
    6 Z4 U9 c5 a( K3 T6 `1 x
25. #include <linux/module.h>
    # i! `3 r% ?# j! L! O9 H
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 R# i6 [' P* Q! q
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    & a; Q& T  c0 ]% v( h2 t
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    5 V1 i( A! m! a5 z# e( w# `& \  Z
34. #include <linux/dma-mapping.h>
    % V# F1 B0 E) V, z9 |. t
35. 
    
36. #include <mach/memory.h>
    + J, c5 r  ~9 ?
37. #include <mach/hardware.h>
    ! J7 ~$ b2 Y6 r) o' N# d
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    7 I% O9 s) ]1 H8 I! F7 {1 p' T
40. 
    , C7 _  N' N, d! b
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    # Q' M9 j' D; _# |+ w* q+ ]# @
43. 
    & b# x/ u- j- ]1 ^' w$ ]
44. #ifdef EDMA3_DEBUG
    + \) L( p  z; b& y
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
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
    % q& n* ]9 e/ t
49. #define DMA_PRINTK( x... )
    3 N: {- s/ s3 M) L- a, u
50. #define DMA_FN_IN
    $ l1 T$ W/ C' W) H5 M- A( A4 y
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    1 B/ ^4 S. h, C2 z
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ; I: d) k; s9 \7 V& w
57. #define ITCINTEN_SHIFT              21
    # ~) {$ H: t1 k
58. #define TCCHEN_SHIFT                22
      N+ ^1 V1 G, a* _2 M
59. #define ITCCHEN_SHIFT               23
    
60. 
    " {. H  _" y, Q4 Y$ h
61. static volatile int irqraised1 = 0;
    $ ?/ C- ?6 K$ Q* k- _
62. static volatile int irqraised2 = 0;
    ! G4 ~4 k9 b+ 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);
    % z8 N8 O. P; J; ?8 ?" ?
67. 
    % x( t' j4 g+ L# L/ h
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    : C( o) a3 y- ]3 e% t
70. dma_addr_t dmaphysdest1 = 0;
    + U- G% e- i, S% h
71. dma_addr_t dmaphysdest2 = 0;
    2 r7 |* }* K$ @& G
72. 
    . V( Y6 R3 O$ X, Y. A# k9 O4 x, f* d; ?
73. char *dmabufsrc1 = NULL;
    - s' _" A4 ^2 ]* g2 }  P
74. char *dmabufsrc2 = NULL;
    3 j" s* m. W6 v. W1 X$ R/ R& c4 L
75. char *dmabufdest1 = NULL;
    ( O: f  K1 B- F  ?
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    3 L1 x. T' ?( e
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    # b! Y2 R8 e9 H
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。
! ?0 @. d; M1 s7 Z8 c     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
1 w) _, e) u+ i  z