OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 }" t1 c6 \/ ?/ x$ ^# `( A

1. [code]EDMA sample test application
   
2. /*
   " e. l+ ]) f! c: B0 ?/ a& C
3. * edma_test.c
   
4. *
   ! {3 m6 P3 s5 B
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
    / l/ y8 f- L/ y) o9 g" B
11. *         TO CHANGE.
    
12. *
    1 e- Y( r# j1 }9 n/ q
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 u. l) Z/ V$ K3 Y* I
14. *
    " B- E7 G- y3 W; Z& q  z/ O* [6 B
15. * This program is free software; you can redistribute it and/or
    - L' R8 i! Y: K, [
16. * modify it under the terms of the GNU General Public License as
    ; v" g9 h! _9 f) Q
17. * published by the Free Software Foundation version 2.
    
18. *
    ! P# V) m- V& n: c  @' l
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    . B$ l" P, A" b( q
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    , [9 ^1 t* i) g7 F9 I# U% f
22. * GNU General Public License for more details.
    
23. */
    9 W. C( H4 b1 z: i" V7 {% R  x- j
24. 
    + c3 |  d0 O2 v/ |& _
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    3 Q4 [; i, q+ U: D) i; o& h  j
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    # i& ~& w- }4 n+ B/ [5 d4 P
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    # ~2 g) Y* |# A3 O+ D$ J# e' h
35. 
    
36. #include <mach/memory.h>
    , q. e( E& {0 M
37. #include <mach/hardware.h>
    0 P0 ?4 z  W& t$ Y) z
38. #include <mach/irqs.h>
    . Z/ D! j& E' Y! o6 g" {( ^
39. #include <asm/hardware/edma.h>
    ) H/ A( ~6 s! n% c8 T* I& T+ U$ e7 P/ \
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ! F  U* x, L0 e; O6 Y  l9 a5 v
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    : G! s- k0 t5 A  L. U4 C. g
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    7 }9 n, ^% H# m" O4 P5 z
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + u1 _4 l+ ]9 T4 o/ V7 O! E
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    / L' {4 H; d& o
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    . c$ R6 @% J# A! Y' v+ H! B% T
56. #define TCINTEN_SHIFT               20
    ! H4 n. P/ \4 n( q  g  r$ k
57. #define ITCINTEN_SHIFT              21
    + g4 e  f. R' V& U" n
58. #define TCCHEN_SHIFT                22
    & ?' ^4 S( O* s( x0 P, v( @# w1 P* v
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , z8 ^. A5 v. D; C
63. 
    " n/ {6 x  A1 a! d& B3 o
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);
    % ?- ]" b* A4 S9 L2 D+ Q
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;
    ) [4 Z7 t  _% v3 @, A2 N
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    6 n  v! }1 h: t: T9 e( M
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ) ^+ X: A8 j) k) t5 x
74. char *dmabufsrc2 = NULL;
    . d1 p1 J) T3 u' A0 W' U
75. char *dmabufdest1 = NULL;
    # Y4 }4 L1 S& Z8 S! R: r/ U$ I  {
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    2 Q$ s* h  j- ~: l) c0 Y( i& F1 a$ G
79. static int bcnt = 8;
    4 T' V( n; Z% a' d2 z
80. static int ccnt = 8;
    
81. 
    " U8 ]' @; f* x, p/ M
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ b0 w% L5 [4 I2 z1 e9 p3 i
) \9 w) I+ {! \$ c% N( F      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。
( J6 U6 `; b7 e$ J7 H0 A- w     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
- D, [' _1 K* {3 H. D9 \
: H3 Z5 l3 u) u5 `9 [6 Z