OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ) G; B6 @0 c% U8 |8 ?, T. q
2. /*
   ; L6 f! y$ @; ?- ~  O& J& \$ v
3. * edma_test.c
   " n9 ]! h: C4 B
4. *
   ! O7 Q# s* x4 N. A- M
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ! x8 |6 |/ \, Z  ~
8. *
   ; P6 g# O2 o. u# A$ Z$ m
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , z( T( d. r8 x+ I
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    9 v+ T. u+ v) Z7 P. C
12. *
    2 L! j9 J' S5 V% o- V
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ v7 v& w% r" p" R) Y4 K* A
14. *
    ( ]& l9 b: K4 X8 r# _
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
    7 Y* b8 R1 X0 ]% _4 H( N5 e
17. * published by the Free Software Foundation version 2.
    
18. *
    ' }: D5 ^  ]. W+ T" S: g2 Z6 M
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . ?) B) \4 X. @2 t0 f9 V
20. * kind, whether express or implied; without even the implied warranty
    ; e1 }% `( Z: d, }2 G* }- V% H9 @* R
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    & _$ X7 c! A: Q8 e/ R% C
23. */
    7 u* A& o8 R# E
24. 
    ' P2 e# x4 @; u! q
25. #include <linux/module.h>
    $ Z6 p3 ]! s: ~4 l
26. #include <linux/init.h>
    " w9 L) M3 N, C( m* Y; `( U  e* ?
27. #include <linux/errno.h>
    ) b4 ?9 J% `6 Y2 }
28. #include <linux/types.h>
    : J. ^! D& V5 [2 U& V$ o
29. #include <linux/interrupt.h>
    ' v2 h/ {; ?! b  e. C, \; `
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    $ r& r! H7 H4 A3 m5 `5 Q
33. #include <linux/mm.h>
    ( X4 }- L2 J3 P* V! j
34. #include <linux/dma-mapping.h>
    
35. 
    0 b) {( |0 A4 a; g
36. #include <mach/memory.h>
    $ J6 |* X0 p) ^' Z( b% G; n' O$ v) p4 o
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ' _& R" ]( K8 l& X2 [6 o; n  L
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__)
    # y. V8 [3 _) r$ _9 u( _; y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    $ y. ?1 o5 `) k5 p- ^, _3 f
50. #define DMA_FN_IN
    % v- f# F# h( x% ]# {: ?+ {  i
51. #define DMA_FN_OUT
    8 k( n2 N3 o( v- A% O3 ?1 }) ]
52. #endif
    ( _' P; y- Y" B  `- z9 @
53. 
    6 v6 R: w4 A& d" F$ W
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    9 N4 S  C5 {2 C7 \8 G& E
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    ; k7 o# ~; y; z# p
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ' V# L$ R0 k  Y! y$ q5 i  [/ M) w6 f  }
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    8 U+ I- I4 Q, E  t* O# H. r
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 J4 D/ z6 x! c. h2 @/ o2 w
67. 
    $ t/ N, M% u; w
68. dma_addr_t dmaphyssrc1 = 0;
    % t9 x4 W0 b9 u# v! u
69. dma_addr_t dmaphyssrc2 = 0;
    , u0 X" W; z1 v
70. dma_addr_t dmaphysdest1 = 0;
    ' L2 I+ i* {7 Q0 }/ Y
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ) _* X. o" p$ b. E5 a
73. char *dmabufsrc1 = NULL;
    8 M. T7 s+ T  M
74. char *dmabufsrc2 = NULL;
    2 u0 D- w" s% U- N" V* ^( s
75. char *dmabufdest1 = NULL;
    7 w$ J8 c( ?7 `7 v
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    3 Z7 c/ c8 Q, g" E$ K; l# U4 Y; Y
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    . {' s) i( O8 j5 c1 r
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

" [3 q4 C' b9 ^      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。
# K$ O% |2 g4 B! V- 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。
9 r9 g- }* m" F+ o9 m4 J4 r

0 S. F& j: p! u+ R- f7 ~3 x) e5 t