OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   . {9 O. I$ q' H7 i+ M
2. /*
   ) d& x* h' b7 P& }' L3 G
3. * edma_test.c
   3 B) D2 N3 _+ g3 y7 A
4. *
   3 n( g0 I0 z' G# U. L
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   , f6 ]; o9 G. O7 ?$ i" E
8. *
   $ i2 k: D) e( q' p
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
      l9 V% B) X0 R# C& B: Z* ~- [* [+ B
11. *         TO CHANGE.
    % p% C0 g& m( c- v* D8 f
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
      r9 [( i$ a7 e* J3 k" O
15. * This program is free software; you can redistribute it and/or
    4 g& L! {/ W: u, o. Z, P; r" U
16. * modify it under the terms of the GNU General Public License as
    0 y- X0 e) ?* P" r; }
17. * published by the Free Software Foundation version 2.
    
18. *
    2 E# m4 q. Z5 y4 a& q
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    * d) f: ?" |& T" k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ( n; `9 {2 {: }# M, m& D
22. * GNU General Public License for more details.
    
23. */
    6 p( ]" |. y3 b9 M
24. 
    + I- Y9 X8 V( D( d
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    " _) P1 g( F( r  {  h
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    . x7 S; |' A/ L- T0 p
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>
    
35. 
    % Z  Q4 B' I0 i. P# S
36. #include <mach/memory.h>
    & c" N6 t8 F4 y  a* z- ^
37. #include <mach/hardware.h>
    6 P8 C/ F9 _6 x' H; r. M- Z
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ' T" l7 m# D$ j2 M
40. 
    ! c+ \/ n& I& T
41. #undef EDMA3_DEBUG
    0 N7 R% h4 o5 g' X2 H9 r9 D
42. /*#define EDMA3_DEBUG*/
    & O* Q) {3 K% Z( P( J
43. 
    8 ~6 p. b  J/ `) Y
44. #ifdef EDMA3_DEBUG
    * R$ {, f  [+ `4 {. M9 g
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    & p. i$ H' O( E4 p
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    7 D+ A9 M- r& l
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    * z) \  {9 U# h$ ^. X8 i
48. #else
    
49. #define DMA_PRINTK( x... )
    " |# F7 C" h9 T
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    2 }  T; i5 z1 n& A' k
53. 
    & {3 ~% [3 r1 [  J& K. l) U, `: F( P+ p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    , o9 \& Q9 a0 |. v  _% N' U; k
55. #define STATIC_SHIFT                3
    / G7 }9 E- m4 O2 X" Y: e$ T
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    3 f3 x& C/ \; ^  P$ M1 C
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    " m; V# I" G- x4 H* f" l
62. static volatile int irqraised2 = 0;
    
63. 
    * L' ~& j; N, O: c7 z
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 \  R% H$ \. `' v+ j, s
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. 
    / Y  y7 H2 a4 [
68. dma_addr_t dmaphyssrc1 = 0;
    % p: a, K5 }' w, X2 ^+ v/ K
69. dma_addr_t dmaphyssrc2 = 0;
    6 C' V; C0 u( N) r6 g& S
70. dma_addr_t dmaphysdest1 = 0;
    # @" V% j/ S  z
71. dma_addr_t dmaphysdest2 = 0;
    5 p& O& y# F* W6 {! L# _$ f
72. 
    
73. char *dmabufsrc1 = NULL;
    . f# o8 E; D$ g; l/ M% W
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & g4 ]* n9 K' H
77. 
    + r% ~0 Y' ?5 T
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    % o, S; b  O  h8 V0 X2 h, f' Y
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

  c! c2 e6 h9 j# W
' a, z, l9 G) t; Y% X# a- K      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。
" l. w7 E; b5 k0 x  [& s2 q     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
+ t8 A* p! g& R, v. [9 o
. {7 A" Q* d7 }' ?! _% q4 v