OMAPL138如何在Linux下使用EDMA3驱动

yyj

. }4 J3 ]: w3 ?9 a+ j- f" X

1. [code]EDMA sample test application
   5 W$ y5 s* Z, m! c' J
2. /*
   
3. * edma_test.c
   $ m8 [; }# Z" R5 g# C6 v
4. *
   7 |9 Y. ]) S5 `: Z! u, S
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ( ^% X- V& b" ~. m! S, n9 z8 J
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.
    / t# h% T. e5 i8 V
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ' h5 w" B( `7 L2 B
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 I3 ^4 S( @7 M8 h3 ^& y0 F
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. */
    
24. 
      i  V- `& i% Z7 R" V
25. #include <linux/module.h>
    " m+ g; h1 S& ^
26. #include <linux/init.h>
    1 I" Z" \" h* ]% ]  U7 d& Q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 H# y* b& w5 Y' M  ], I1 a
30. #include <asm/io.h>
    & B0 ^3 K8 l* t; c  q3 l  @4 ?" O
31. #include <linux/moduleparam.h>
    3 R; ^8 B) {! h) m1 h% r$ _
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    - u# @! n# r. a5 e2 y* F* S2 e
34. #include <linux/dma-mapping.h>
    
35. 
    2 h* {! v6 [3 V2 I% y) l& H
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ' _3 L, E' V' B- _
40. 
    
41. #undef EDMA3_DEBUG
    % Q: w1 X$ S3 O2 \; I8 Z8 k
42. /*#define EDMA3_DEBUG*/
    
43. 
    0 E1 D6 d% }4 c  k( _  W% u3 Y
44. #ifdef EDMA3_DEBUG
    . c  A6 V5 e5 @8 d  ]  E
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    5 Y: j8 h+ j  N2 m' N" i6 Q7 m- C
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    - `, F) m3 w8 R! e+ J
50. #define DMA_FN_IN
    ) z% [6 h0 P3 J; O+ n% V* h
51. #define DMA_FN_OUT
    
52. #endif
    0 g; n. B6 f5 N- i) S" y# D
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    3 P7 L" Y$ K* p" A  |
56. #define TCINTEN_SHIFT               20
    2 R* {: C% D! R4 k  F- O: V1 W
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    # M2 v# |8 E% Z1 _8 U/ j8 U3 R5 M
60. 
    - \* X8 L: Q8 W# A2 k6 o  c- Y; P
61. static volatile int irqraised1 = 0;
    # H5 Y& c# A( k# t7 O, _
62. static volatile int irqraised2 = 0;
    % z* ^& d# z' m" _
63. 
    / \" e- C- f+ N) `' \( l
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);
    " a' y! Y2 x1 B9 w$ L- }
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;
    / f* k. D+ X  f
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . G& k. P5 a$ {: r5 k. P  X
73. char *dmabufsrc1 = NULL;
    : V, ~' u6 u, T# X( B+ m8 }
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    4 l% m! x0 t3 a4 Y- R8 u+ b4 y
77. 
    , x9 W8 ~4 k1 N1 L  K* w' T/ v
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ( b$ B* w5 B( U! C' o& L
81. 
    * S8 V4 ]) X( e& K9 d
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    6 A- v  n; L) E" p: _
84. module_param(ccnt, int, S_IRUGO);

复制代码

4 k. I- o) T4 o* y( p7 f
$ Z$ U( o3 T& L& A- {9 e      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。
9 O/ b& g& ], |7 H' |0 S5 E     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


. V4 S* i& c9 L; q# _