OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   $ P% M9 ~4 n# E; L! c! T$ {& d! R
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ' {$ k1 q# z/ m8 K
8. *
   / G  x3 m9 o3 O! s1 \
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ( c4 C) [7 N4 C  s7 C" u" @% R
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    9 n/ h$ I$ j/ @8 T
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    # j/ P1 m, G6 d6 k; _* M& Q0 A
14. *
    
15. * This program is free software; you can redistribute it and/or
    ) U# Y4 w! A6 k0 i  G. z9 c( p
16. * modify it under the terms of the GNU General Public License as
    3 e4 o/ M& T; x: Z8 i
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    * N' D- T5 b6 D% F+ a
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . A4 d1 M$ b0 e4 ?" f# z. L/ l
22. * GNU General Public License for more details.
    
23. */
    0 @# L* I; s  \) L9 O& C( Y% h5 F
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    2 K6 n$ u/ Z2 G4 r9 c" r$ f& J( N1 S
27. #include <linux/errno.h>
    & r+ U$ s! D5 D& S
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    , g, Z& R: L8 V+ o
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    8 R) ~5 o. L' m% C3 e! }
34. #include <linux/dma-mapping.h>
    3 f. E% E) X7 Z6 a* I; f7 S6 z
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    " q9 Z# m! G. D, p/ N3 l5 R+ Q
41. #undef EDMA3_DEBUG
    ( H, g' h( j) Q5 \( P
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    6 l* k6 b2 b! ?1 `4 O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    % n* }4 G- Q4 s& a* Q$ Q& k
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    $ Q  a3 D9 s7 }* h$ d2 t8 t/ }
52. #endif
    
53. 
    9 G# s7 b9 R* v/ T/ D
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . E6 B$ L3 m# y" b& q1 ?; ^" q3 O
55. #define STATIC_SHIFT                3
    ! [; A6 U& ?6 a; {  B
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    5 @- x4 l6 P; b5 T# x# n+ M
59. #define ITCCHEN_SHIFT               23
    
60. 
    * T# H5 [& U" w" A( \
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    6 M# {3 j/ D! Y6 q. R) d: }8 a
63. 
    8 N8 ], P% b9 G3 B. R! Y/ U. S! n
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. 
    5 D, s  W9 h- O$ E  O6 y
68. dma_addr_t dmaphyssrc1 = 0;
    4 h: X. M+ J; Q* q) O. l
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    # s3 O" }2 n# ~$ U; p, A( O0 B
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , _) `& X/ P8 F
75. char *dmabufdest1 = NULL;
    4 n5 p0 ?0 L  R
76. char *dmabufdest2 = NULL;
    - a6 f& v- c: v: h5 N
77. 
    6 }2 o# q+ r* f
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
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

3 E; N* z3 S  o+ b
      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。
% w4 x3 B$ x) D8 [& D7 u. M     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* M/ @/ P) C% U8 V9 @8 l
2 P: v& i9 @1 S6 j( V0 o( ^