OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   . \6 y' I4 E) n' y- q
4. *
   $ m9 @+ v# _- G$ h+ d& h
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    
11. *         TO CHANGE.
    7 x3 {1 y+ c, w+ v2 c
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    % Q) e9 o! V3 x/ d( x/ e
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
    & h9 _1 x( U0 d% b/ I$ N6 Y, f
17. * published by the Free Software Foundation version 2.
    6 p% h$ C" |* r& \2 Q; U7 @
18. *
    * e0 {9 w5 F6 z. U
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.
    
23. */
    * ?7 G5 a$ U) U, x! C- J6 N, z( H
24. 
    5 }! o# R: h7 X9 i& [& x
25. #include <linux/module.h>
    5 g5 I: o0 M+ f6 P- l( l' U* z1 K* y
26. #include <linux/init.h>
    + k7 U+ A4 ^& j, N, m# ?
27. #include <linux/errno.h>
    . M, n9 K8 c9 X, w9 ^& l: t. ^
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    $ _+ V1 A) ?4 o/ g4 L- }
32. #include <linux/sysctl.h>
    . w* k  X- I- L8 ^# z
33. #include <linux/mm.h>
    5 C" E2 @, J0 t" y& a3 [  R
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    * e" Z, p$ H9 l7 V; A
38. #include <mach/irqs.h>
    7 `! P  }# J7 d: W+ g6 A
39. #include <asm/hardware/edma.h>
    
40. 
    ! }) w( @: A* q( o# [9 q7 M
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    " p6 M! p% F2 N5 {
43. 
    
44. #ifdef EDMA3_DEBUG
    0 o0 ?9 H. L8 z+ h- i# L3 i. I0 H
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / \+ K1 A( t6 P3 m" l2 F! o
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    1 n; e" C, r5 v8 f: L- G. x
48. #else
    
49. #define DMA_PRINTK( x... )
    1 O# F  l3 ]1 [+ d( U& G( W: g
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    # @5 `$ H9 @/ @3 \) X
52. #endif
    4 V2 O' _" z# W. m) N
53. 
    0 |) R. ~2 v5 Z* f
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 z  S# A$ b# \( I2 i$ O
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    7 {  Y4 j. w" I7 Y
57. #define ITCINTEN_SHIFT              21
    9 b# a4 O* x& F
58. #define TCCHEN_SHIFT                22
    6 `/ q7 {3 D3 b5 D/ L" K5 }
59. #define ITCCHEN_SHIFT               23
    ' |6 c1 z  l1 W5 i$ I6 ~
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    7 G2 C1 ~6 C& j3 P4 k! }
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);
    ) c6 m5 [% u2 ?* T4 \, n0 F
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 N2 x' L6 f: g- A8 s3 I/ L8 `' h. N
67. 
    1 `& G- v; l- D, h+ R1 C4 i1 ?# L
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    2 B* n% t7 Y  n$ h# K
71. dma_addr_t dmaphysdest2 = 0;
    3 s7 T* s7 X2 m
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : {; \) q. e; \" t: _" p/ N  J
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    8 X& n" s4 ~+ q( p
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    7 k9 ~% o9 `. O1 P+ t$ w2 f7 u
82. module_param(acnt, int, S_IRUGO);
    % q$ C2 Q0 h  T4 A2 d/ f
83. module_param(bcnt, int, S_IRUGO);
    . z! U& k: N0 A- a: q  m
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
5 |' z" {, c3 K6 c, 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。
; i; b/ M) I( R$ g. 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。
) w; h1 G1 ~2 j4 ]9 x
! ?# m* i$ A* y$ O