OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   2 F2 V8 F$ v, n( h0 [' S2 e5 g& p+ c
3. * edma_test.c
   # ~7 `/ W' o- q: Y+ s) u
4. *
   / t! y* w' y$ s+ A, l* f
5. * brief  EDMA3 Test Application
   - P+ S! @  F0 @
6. *
   5 A4 p- h% h4 P
7. *   This file contains EDMA3 Test code.
   5 V2 _6 h+ T4 o, V0 e
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   / J* Y1 n* Y* v+ ]6 q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    . j$ M8 O' j8 Z# ?( Z
11. *         TO CHANGE.
    
12. *
    2 N6 a# U; }8 p3 w# P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    + ?- ^) q5 B% [1 y& C" U, N
14. *
    
15. * This program is free software; you can redistribute it and/or
    0 b& l" \7 G; r* F
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 \( E$ }6 K4 O" C
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.
    0 S# N6 M% Q1 f" N5 Y6 S
23. */
    $ M5 [' h" D# y' M" T1 o
24. 
    
25. #include <linux/module.h>
    ( R; A+ Z: Y% M" \0 r
26. #include <linux/init.h>
    * z7 i: R* @8 z, a9 n' z+ `
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ! I* i4 [+ d5 T: n* Y4 A
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    4 m8 {3 l' X9 J! O  [) U
32. #include <linux/sysctl.h>
    ! j& i, a- r& k8 d( y2 {
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    - _6 z! Q9 }. p1 b
35. 
    
36. #include <mach/memory.h>
    - T: J: e1 a9 ]4 h
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    + E+ x  K& P- i
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    " _- W+ k9 P+ r; @
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    ) ^; K& }1 [9 \# y$ \
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & k7 }+ W0 T' D/ \6 z  E
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ( x' W* `9 I  `4 t; _9 W, s' g
52. #endif
    / I( ?/ j6 h# L
53. 
    ' V6 Q5 y, [5 x
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    2 o7 N% m4 a( \' K: Q# N- p2 u% N
57. #define ITCINTEN_SHIFT              21
    ( Z3 `- Y5 ]& M# R( H! v
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    , ?1 [+ T  I- S/ {# y3 }
60. 
    
61. static volatile int irqraised1 = 0;
    ! _; J7 ~& n; d
62. static volatile int irqraised2 = 0;
    ) Q3 g" w; m- K1 M; {
63. 
    4 U. L$ b4 [1 C" I  p' h
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 j* ]/ T( [' k1 A: `0 G
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);
    - f0 n$ _+ I+ ~
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    6 a, Y0 P; M* y% U. ^
71. dma_addr_t dmaphysdest2 = 0;
    6 o% D" I/ s1 t' d" d$ M
72. 
    ) t# ~5 j% J/ n/ H1 S
73. char *dmabufsrc1 = NULL;
    + `! b( d+ U  E+ g! u# p: ?
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    # \( o6 L$ y2 H4 M' m6 N: [) X4 A
76. char *dmabufdest2 = NULL;
    
77. 
    7 F0 a, A* s1 r* |+ l' }
78. static int acnt = 512;
    6 |  v! G) o+ I! W0 N: {5 z1 R
79. static int bcnt = 8;
    : U' B" C0 J" {& f
80. static int ccnt = 8;
    
81. 
    + q6 R- q0 J5 i" W: |! Z* j
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    . h3 q" W- _; d# H
84. module_param(ccnt, int, S_IRUGO);

复制代码

! H& d& f/ J( L& L
' p) f( ~# K% g( e/ v9 M. W" j; r      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
9 ^6 w; m) @) r: @2 J/ d% aarm-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。
, ]$ a/ H, c: w% o7 w! c6 f     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

( m. D2 u& t" @, V9 l1 f( _" n
* W" e0 K, @) ]' s0 H' J; l  _# i