OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   / n. W( y& D. P9 m: x! S
3. * edma_test.c
   
4. *
   % Y9 @# e" d* d* B. P
5. * brief  EDMA3 Test Application
   2 B6 M0 _" y3 u! u" ^% p
6. *
   6 A1 Y4 c7 K  k$ p
7. *   This file contains EDMA3 Test code.
   
8. *
   0 q% `8 F" t" G4 n
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ l6 J" A2 a, r
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    5 R2 V( U2 s: F% m; z
11. *         TO CHANGE.
    
12. *
    1 t7 ~# k( d) e: U
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    1 f4 r  O2 Q6 e( n/ L% e+ v: v
15. * This program is free software; you can redistribute it and/or
    & u# f: ~4 [3 z8 X0 i' w% M
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    . O6 a2 o$ \. Q9 F3 F+ Y6 K; G/ Z
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    0 i8 a2 @* x7 r3 \% J  H5 u
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. */
    0 Z8 \, h/ Z, P( z
24. 
    
25. #include <linux/module.h>
    4 H! k4 z  E" P. G9 k) w% p
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    7 g8 S  |# _& J# }( `
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ; O3 c. C0 k8 l/ E0 |& m
30. #include <asm/io.h>
    5 l# [1 S5 J9 P* U  M' B0 V
31. #include <linux/moduleparam.h>
    4 K% ^! x+ m$ {) I
32. #include <linux/sysctl.h>
    ) i/ H5 v: Q# A
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    : @5 T% P# j( E7 R. V- [
36. #include <mach/memory.h>
    8 g4 c# I- Z' c) |
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ! T; W" H: C" E* c( v
40. 
    7 _9 G/ T; X) O3 Q, ?
41. #undef EDMA3_DEBUG
    3 s4 F2 @0 o' P0 c7 b
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ) K6 r$ Z" A( V
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    7 l+ n4 q( _4 w: P0 w3 C) r
52. #endif
    6 P. P. w0 C1 ?  U: |
53. 
    ) g. _/ I. |: }4 y$ A; a, f
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ; }" T1 q- f5 |6 C2 ]
55. #define STATIC_SHIFT                3
    ( i" P" C% f! u8 K' m8 g
56. #define TCINTEN_SHIFT               20
    " _" g/ z1 }* m! @& Y
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    : C7 a! n. U1 E6 C0 |5 o
61. static volatile int irqraised1 = 0;
    , S! F: b# U  E- H( ]% M
62. static volatile int irqraised2 = 0;
    
63. 
    3 @  W" I* I/ G# h
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);
    
67. 
    % F- g2 H# x" u* _. ?
68. dma_addr_t dmaphyssrc1 = 0;
      U0 }; l" H& |! }3 x
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    9 j! a$ b: Y/ K( s* r+ z) n! |8 K
73. char *dmabufsrc1 = NULL;
    & ~/ N3 A  I$ A4 g
74. char *dmabufsrc2 = NULL;
    - I% z8 p' [* N& D3 e! [% ~
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    9 v! B* o3 [, O8 v; I4 D
78. static int acnt = 512;
    & v$ [! q: h: F+ _
79. static int bcnt = 8;
    + [+ m) u# r  c8 z: q
80. static int ccnt = 8;
    
81. 
    2 E* D) i" o9 ]9 o9 q7 _
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

+ \' ]2 C2 f7 H0 N1 Y' |. 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
3 F. D6 ^: ?/ x' q( X6 e4 aarm-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。
2 }- d2 n* Y6 ^5 K2 _, p     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$ \! B5 z& S- x  H: U8 d
  @1 I2 [: d! a0 [3 h$ f9 e5 D