OMAPL138如何在Linux下使用EDMA3驱动

yyj

. p( b# I0 b( R5 n7 L: p' L

1. [code]EDMA sample test application
   + O' u0 x; V4 t4 H  s" D
2. /*
   
3. * edma_test.c
   " t7 y/ B& C% P5 D1 I" r$ A
4. *
   ; R5 p  P9 u6 K( w8 b
5. * brief  EDMA3 Test Application
   1 m% G$ V: v+ d
6. *
   
7. *   This file contains EDMA3 Test code.
   2 K! r, o" u2 m* w" u, M( W
8. *
   ) j. g, \/ Y7 j& I# i7 s$ `
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
    ( A# s: R5 R/ s- t! J% N# a
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    0 Z, q1 i, c8 P
15. * This program is free software; you can redistribute it and/or
    - G5 P7 K1 o$ H+ w
16. * modify it under the terms of the GNU General Public License as
    7 R1 W3 h1 m. O/ K
17. * published by the Free Software Foundation version 2.
    # f7 L! e7 F( }
18. *
    
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
    - l+ e$ L) g; i* I
22. * GNU General Public License for more details.
    ( P  u3 l( b7 h% W2 n
23. */
    
24. 
    
25. #include <linux/module.h>
    9 J2 t, x$ `6 S" s! K
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    7 d1 Q) l! z- h( F
28. #include <linux/types.h>
    ! X( O: ^& y5 @% B' V9 `
29. #include <linux/interrupt.h>
    3 @! ?2 W/ G, F  n# ]0 V
30. #include <asm/io.h>
    % q2 G2 j' j, j+ g/ L
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 E% s  M7 O$ s
33. #include <linux/mm.h>
    # U# x% v* f$ v! i2 k& C
34. #include <linux/dma-mapping.h>
    4 l  C; \  u) E$ N1 q  V6 s
35. 
    ; T" l/ J7 C7 {. Q; H
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ( Z" X  X0 n, }/ L" H! o2 g% x
38. #include <mach/irqs.h>
    % m) N# \- t6 `# D
39. #include <asm/hardware/edma.h>
    . c7 |$ @) C% F( Y/ o0 E; G2 M
40. 
    
41. #undef EDMA3_DEBUG
    / o- {8 Z3 K8 W3 ]5 E
42. /*#define EDMA3_DEBUG*/
    
43. 
    ' l9 H1 o6 D% b' U
44. #ifdef EDMA3_DEBUG
    ; n$ J# K  f8 J& U1 T7 d9 j% S/ d9 ^
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ! J& k7 p$ `9 W# Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ! ~' N- @" y1 a% L8 a
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    2 @5 t- _" J7 Y7 H4 a
51. #define DMA_FN_OUT
    / N. H) L! K. R  S8 M
52. #endif
    8 j6 x: V6 e$ @" u3 X( h8 d
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 r! s/ n8 q6 T6 ]( x
55. #define STATIC_SHIFT                3
    9 J% D$ ^( t4 h9 T( H3 ?- X3 L
56. #define TCINTEN_SHIFT               20
    + Q( o$ q# M! r0 [( h
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    8 ~4 B# a2 G  N# N2 Q9 i! n
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ( r0 N$ o) b: z* M
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);
    2 N+ \2 R: g) E% d% P
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * l5 c  O$ D! E$ E% O: u
67. 
    3 o: l0 ~5 |8 b* ?; w
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ( P, X2 R$ k, E" Q
73. char *dmabufsrc1 = NULL;
    0 S" x2 q! R3 n3 D
74. char *dmabufsrc2 = NULL;
    7 M2 l) m: K0 X3 V& ]( @
75. char *dmabufdest1 = NULL;
    & \; a. o+ T6 k0 u" |3 Y
76. char *dmabufdest2 = NULL;
    3 i7 n* Z: A( Z$ y* w
77. 
    5 I0 T: {* L! t, w  [) M
78. static int acnt = 512;
    
79. static int bcnt = 8;
    7 X' r0 [# l0 r8 A' L- i
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    , L5 F$ K* h7 D8 w
83. module_param(bcnt, int, S_IRUGO);
    9 g+ p8 c. m& r4 O; o5 Y$ J
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
2 @8 F8 I2 o7 J! e7 R. @' oarm-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。
7 B, b* n( D. h* M. t( Q7 H; ~     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


' \: N) I6 C9 h% @+ m2 i3 G+ y