OMAPL138如何在Linux下使用EDMA3驱动

yyj

3 ^# p" s0 D+ X* r) f0 E

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   / j" Q( f9 U9 {! E
5. * brief  EDMA3 Test Application
   + ?/ \/ v. s# r* h0 t* G
6. *
   , O5 W" |9 e4 }! W1 |3 M. {) P. ?
7. *   This file contains EDMA3 Test code.
   
8. *
   - d9 ]* n7 @; q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 e4 K, c( `$ Z$ ?' W7 W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    1 w4 F( e6 H- Q
11. *         TO CHANGE.
    " p8 V! b% H  T" A8 F9 N2 V
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    : Y9 R! A5 U4 p0 s& r9 G
14. *
    
15. * This program is free software; you can redistribute it and/or
    - e. N# W4 D# h
16. * modify it under the terms of the GNU General Public License as
    6 v$ n  s2 j% B
17. * published by the Free Software Foundation version 2.
    1 h- ^* b  d* P0 z6 _9 Q
18. *
    # O6 K% U4 g2 @' D  b- G3 G8 K1 G
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
      H' |4 L0 q! [4 o6 u1 d2 _- r
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " ~% f4 a! Z1 {! ~. K( W
22. * GNU General Public License for more details.
    
23. */
    & i) _  ^8 p- n& R/ V
24. 
    
25. #include <linux/module.h>
    . C% W. D' e# ^
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # X4 a2 w( f5 f
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ! `2 E0 j: ~" @
30. #include <asm/io.h>
    2 E/ i6 @4 E/ @& s4 z8 j$ H: F% D
31. #include <linux/moduleparam.h>
    - g6 |( \$ `' Y/ V( A5 L5 e
32. #include <linux/sysctl.h>
    2 B& o9 T9 M! m0 B) f6 D% I
33. #include <linux/mm.h>
    ! W: s! R/ ^6 O5 m8 O  s, B. Y
34. #include <linux/dma-mapping.h>
    ( [! x- z) \  U4 B; y, g+ z
35. 
    ; @- U: y) M# i; U
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    9 j9 |0 W5 n5 f
39. #include <asm/hardware/edma.h>
    
40. 
    0 {1 y% \8 W6 \3 V
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    8 w! _; P3 s+ r! Z% b! z
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 z7 d& |9 x6 N9 T. o
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 Q9 h" J0 \) a5 S
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    3 E) ~- y3 p- i& m1 {3 r. ]' Y) u( u
48. #else
    3 Y% M) [# G1 @6 @
49. #define DMA_PRINTK( x... )
    * ]: Z8 _4 C6 B4 q) y" [! L+ ?
50. #define DMA_FN_IN
    / I" M9 e: a/ @( H
51. #define DMA_FN_OUT
    " Y2 u, g& K7 j- z1 j
52. #endif
    ) B! j0 {, {  P# f: R( s
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    % J9 ^# [! [# f( }5 r
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
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);
    3 A7 j8 d: h. u2 r# B% O( x0 X
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;
    2 O, O: A; K" J1 `& k. x; Y7 ?' \
69. dma_addr_t dmaphyssrc2 = 0;
    / R. ]0 E, }$ q% a( A
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    7 t) f  \( o3 \$ k2 N
72. 
    4 y3 ]7 k' ], l5 ?$ _* n4 d: G
73. char *dmabufsrc1 = NULL;
    . G5 G: I, [8 z! ~: F- \& u
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    9 s  Z; [1 A; r, N$ ?
76. char *dmabufdest2 = NULL;
    ' h! m' t$ T$ d
77. 
    0 b$ g& m0 s- j
78. static int acnt = 512;
    4 N" p9 K0 ]* L
79. static int bcnt = 8;
    ! f3 g. i0 y& J5 A  c
80. static int ccnt = 8;
    5 [- v8 l; e" @" V8 N6 |0 x
81. 
    
82. module_param(acnt, int, S_IRUGO);
    4 m6 N4 j3 J( q# L) {$ @% b
83. module_param(bcnt, int, S_IRUGO);
    3 c7 W3 k9 X" N& w# M
84. module_param(ccnt, int, S_IRUGO);

复制代码

% @5 O' R' N& T( Y0 j      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
0 E8 v7 j+ C3 b' C3 yarm-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。
9 l1 W2 n/ U3 j     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
5 s+ X; Z# b, {4 ^