OMAPL138如何在Linux下使用EDMA3驱动

yyj

4 E9 e$ Q, Y% J0 H

1. [code]EDMA sample test application
   
2. /*
   9 t$ X* D9 U8 K5 g& E; V
3. * edma_test.c
   6 N: H  g. M3 y4 p# h
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   5 J* p9 c# t6 k# H# q4 d. M3 k) r
7. *   This file contains EDMA3 Test code.
   
8. *
   . u) h! x7 Y' O' G. f, K3 r$ R
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
    ( {2 P# t$ h9 ~, y  ]# I! Q
11. *         TO CHANGE.
    
12. *
    1 c2 S! ?2 {7 X! F7 q# r% K
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( r5 N% V4 x) Q6 a. G2 I4 y
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    # y0 A, o* j! `" v. z
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
    ! `4 b" y/ ]3 G. E& X! f
22. * GNU General Public License for more details.
    1 t2 l* @8 b* t2 }2 ?
23. */
    - r9 d. P1 y! s9 H
24. 
    2 T) V3 ?% ~2 n" B/ \
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    2 _  T7 r5 S' n6 C. S6 `
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    5 V7 t/ o4 r3 l" ]
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    7 o! g3 P7 A8 G6 y
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    , g9 V) c- ~9 M$ A5 _$ G
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    4 Z) x& d! j, V; x) j3 K7 y
40. 
    # Q. J! R1 Y. j: O+ k0 s$ d9 i; n
41. #undef EDMA3_DEBUG
    ; e0 Q7 `* t4 B2 M
42. /*#define EDMA3_DEBUG*/
    
43. 
    % E' h0 X' o! e! ?+ I! T
44. #ifdef EDMA3_DEBUG
    : J4 N: }3 u1 R; d% Z; D7 V
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
    
49. #define DMA_PRINTK( x... )
    ! ]3 |" y! N0 g5 T4 V! [8 |# z' q, _
50. #define DMA_FN_IN
      y4 A) `+ L3 J9 A; a
51. #define DMA_FN_OUT
    5 T; b4 t  `) {
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    * n* N: _9 {1 K3 Q* f/ r7 @6 w4 R
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    2 \. d" b/ E+ Z* s; B+ j5 G2 Q
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 t3 Q: x! w( a3 s. r
60. 
    
61. static volatile int irqraised1 = 0;
    ! A$ i+ |8 Z$ O7 I  ^# T8 {# y
62. static volatile int irqraised2 = 0;
    
63. 
    2 i% k% I$ ?/ S6 P: a6 D$ }2 v
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / v9 d+ G0 x. l9 x
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    ' u; m) ?" c( a" _  X  ~
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    * J% I/ P% J" m3 @! A3 {
72. 
    * d  H2 J9 E3 e* f  D2 N" Z- ^) A0 D
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    , V: D7 o9 T. I% u" z
79. static int bcnt = 8;
    4 G6 q; M1 P% A9 ^& v) H. M
80. static int ccnt = 8;
    6 O6 B0 t: F2 I$ w
81. 
    2 q0 X+ q/ f+ f% {
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - V9 ?! l% j# v! u( _5 t5 A
84. module_param(ccnt, int, S_IRUGO);

复制代码

: n8 e1 S/ ?# D+ [, S
      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。
1 A; n. T6 z2 z  C7 {- T" A     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; z0 n( K
" y; \3 F! {, ?! t' [) d. d/ H
! y- L  L- ~4 Q# ]0 A2 x