OMAPL138如何在Linux下使用EDMA3驱动

yyj

( c1 B1 B! u7 M+ q5 K8 ]* T0 n* J

1. [code]EDMA sample test application
   
2. /*
   ' I, Q" I8 @  c/ J2 @( Y( A
3. * edma_test.c
   
4. *
   # ]/ Q4 \' _/ O9 L! u
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   0 D2 W- T. Z  M$ {# G5 c. B4 U# y
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   : E! @3 G1 T' U6 i$ z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    - A+ u: J; |" c: G) S' C# u
11. *         TO CHANGE.
    1 {2 ~3 C& C8 [1 ]4 r# z2 e3 {
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    : _0 h4 E! A+ H+ j$ D5 J/ H
15. * This program is free software; you can redistribute it and/or
    : {. B5 U( Z5 G  m7 N; d) }
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
      P/ i/ h/ [0 \! w3 l! F  f" Z3 q6 R
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. */
    " p1 l' {# P3 C1 s
24. 
    7 N% ^1 v3 y2 n' q, h. \
25. #include <linux/module.h>
    ! c' }6 V% _# W& O7 l+ J5 J" ^* G
26. #include <linux/init.h>
    6 q+ X1 q1 L, T+ J
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ( M, I3 p) y; v% o; q% s2 A
29. #include <linux/interrupt.h>
    9 K: E: x* _  q: a7 a
30. #include <asm/io.h>
    1 o) Z+ S1 t) U; ?) @
31. #include <linux/moduleparam.h>
    ) \9 b' ?. h* V8 h7 [0 j% _
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    7 p5 O6 F( G4 ^
35. 
    
36. #include <mach/memory.h>
    9 R$ m, ?" q- |, C( U
37. #include <mach/hardware.h>
    ) w3 o: _+ Y, z# _0 q$ N6 @) r. I
38. #include <mach/irqs.h>
    6 X& {, Y% v0 s. @
39. #include <asm/hardware/edma.h>
    # E9 t; K& x! @; R4 r; R* d
40. 
    $ ^+ Y0 J* X& d" d
41. #undef EDMA3_DEBUG
    $ `% V9 F/ N/ F) P! \- b4 K7 f0 a
42. /*#define EDMA3_DEBUG*/
    / {: V, F  ?( R* g- ^! T
43. 
    0 O3 `7 Z7 |" \' b# C9 i
44. #ifdef EDMA3_DEBUG
    3 e* O$ x2 g0 M1 u3 _6 G4 ^: I
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( e5 a8 j1 u; C; M6 s8 h
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    8 G: A7 g; p; m
50. #define DMA_FN_IN
    ! A! ^" h$ u! i2 _
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    , v6 _% A. ~) V5 J' L, b, ], Q/ @# p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    0 P1 @) K, Q) x! |, @
55. #define STATIC_SHIFT                3
    7 P$ C  v9 ]* ~" S0 z2 \4 N. Z: Q
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    1 @3 |, Q+ v: o* d4 y1 f% H% X
58. #define TCCHEN_SHIFT                22
    7 ^  m) y3 Q! x1 S5 ^8 A5 m
59. #define ITCCHEN_SHIFT               23
    , j4 A1 D9 b* r2 R
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ) h1 q$ H7 D; \
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);
    $ m* T# C. W' m0 P
67. 
    , T# E* v9 Z% U( w  ?
68. dma_addr_t dmaphyssrc1 = 0;
    ) O, T& l$ `# M* X" u/ b
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    # N" Q6 }7 O$ Q% F4 Y& F0 E- I$ x
72. 
    
73. char *dmabufsrc1 = NULL;
    - R9 J( W% f$ P4 }4 |* J  W/ c
74. char *dmabufsrc2 = NULL;
    $ D: B# V2 D( R1 }
75. char *dmabufdest1 = NULL;
    0 k6 Y2 r8 _* N& H3 O# {
76. char *dmabufdest2 = NULL;
    5 \5 @$ n% e6 ?) x, x6 D- x, a
77. 
    $ \* i. ]4 C  \
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    5 ?5 m: L$ G- R) Q
81. 
    
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

      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
! e* q' o" \2 }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。
' j4 m- z4 }2 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。
9 y* S! @, ?- o5 g: v0 Y

' [- w; y* \+ P) k$ U