OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 p5 d4 w" a' ?& A  u! Q+ X1 ]- ?$ ], e

1. [code]EDMA sample test application
   # h  k' Y. M. j
2. /*
   " h8 K- h/ q: k% [8 k
3. * edma_test.c
   
4. *
   ! g( \  Y& q* o- W5 }6 y
5. * brief  EDMA3 Test Application
   
6. *
     |5 @% v8 B1 l2 d: `1 m
7. *   This file contains EDMA3 Test code.
   & r% m8 g! J; A3 K; t0 q
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.
    
12. *
    " f) E+ i! P& g5 n6 S2 w" x, s
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    8 J" \& [7 U3 |) U$ |
15. * This program is free software; you can redistribute it and/or
      Q8 `6 S! \2 I" i
16. * modify it under the terms of the GNU General Public License as
    1 ^' J) ^) e* j' l6 e# T
17. * published by the Free Software Foundation version 2.
    ! U. E8 x1 k4 u% E" F
18. *
    ! {5 y: I% m" S( h- t* Q3 I
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 E: |% L3 o% t" r' i
20. * kind, whether express or implied; without even the implied warranty
    1 i% I# T& r- n
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % k# Z( h5 [: \; Z
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    & s' w/ {6 `% x3 D. @
26. #include <linux/init.h>
    4 f7 l, D0 i9 g7 W$ G6 [: P
27. #include <linux/errno.h>
    / t$ M; e. u: H  s  \/ [
28. #include <linux/types.h>
    8 {9 Q# X9 X# o- g+ B: t: t# {2 U5 l
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ( t% s8 t3 _, W# r3 B1 K4 B
34. #include <linux/dma-mapping.h>
    
35. 
    . R/ s6 m. t7 t+ F0 I3 T
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    " W" s. M/ G+ J: p' i
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    9 k1 Q3 ~0 H+ B/ d% y  L! r5 E
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ' O. @- Z' y2 M
43. 
    / R6 Q/ f$ g7 v2 F
44. #ifdef EDMA3_DEBUG
    5 Q/ z4 ]+ U0 r9 K6 V- s
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    3 k" \1 o+ ?* m% w8 V# s9 \
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    3 p' G3 ?3 K% q* l* W) O
48. #else
    
49. #define DMA_PRINTK( x... )
    - }! G1 j% a3 j& C+ S' ?6 g
50. #define DMA_FN_IN
    8 l" D  l" |  e. d
51. #define DMA_FN_OUT
    6 b' R) A* S0 M' L+ B
52. #endif
    1 ~. e4 ^, u- ~9 J
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 `/ v' n  l0 ]6 f
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    . t4 k" d, h& Y" h/ n9 D- m, x
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    * q* l/ @/ n+ a/ Q4 g
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; g% ~3 D' R4 Z2 I  s# D+ |8 X
61. static volatile int irqraised1 = 0;
    2 A1 o& g0 g4 x) V3 p
62. static volatile int irqraised2 = 0;
    7 t/ E! E: h$ [, A, P- m" A. U2 f
63. 
    ' z6 T+ z, |) P9 y: H4 b( M# }$ V8 W! P
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);
    ; ]4 ~* V; |+ n% @
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % d- v' H! d# V9 z( A5 ]
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 Y8 E6 ~4 D! M2 q5 m
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    % W$ X0 S0 ]( u& s0 C5 d
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    # O% L$ K# H7 v9 F4 _6 ]
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    $ n5 ]& p/ ~1 E& `
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ; F; p# d, g; a9 d6 W1 e
80. static int ccnt = 8;
    ! |( ^; u; ]. M) E2 F
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ' G9 d* A3 @2 L4 A. R
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

% m9 F1 a2 c$ U# A      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。
' Y% r- E, R! e, X, N     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
8 ]( V# Y/ {2 D
: H# ^: n) Q4 m' Y6 x