OMAPL138如何在Linux下使用EDMA3驱动

yyj

3 }3 p; e% R) V0 D

1. [code]EDMA sample test application
   
2. /*
   + P% r7 `5 l8 @4 Z
3. * edma_test.c
   ! F: w1 o- {* t, d' |% t5 ~
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
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
    & O  S7 T8 s2 i+ Z" g3 P
11. *         TO CHANGE.
    ) d; @8 K, I9 U' U) ~
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 U- v1 \* A, h" B2 B2 M; L
14. *
    
15. * This program is free software; you can redistribute it and/or
    ! L8 D8 h6 _, D  `+ j7 W
16. * modify it under the terms of the GNU General Public License as
    & q* Q$ L/ p' r& @# H& |
17. * published by the Free Software Foundation version 2.
    6 Z% t. Y" u/ K$ Y) |; F
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      C- t& T1 K' X3 f. q
20. * kind, whether express or implied; without even the implied warranty
    2 q. u% A! H- _% E" [7 e( v
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      a/ b) e3 O0 a6 @8 k
22. * GNU General Public License for more details.
    ' k& p7 B) ?, h; m, J
23. */
    
24. 
    % W0 o" Y6 z" \
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " i. W5 z  o0 w4 ]+ {9 S, x* K; J
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ( U2 c$ h% Y* M: x0 J$ E5 _( K: N: g; t
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    8 x/ A" S8 n4 c2 X! M0 X
32. #include <linux/sysctl.h>
    6 P! L$ ^9 r7 M
33. #include <linux/mm.h>
    6 a  N5 _% [& Q! G
34. #include <linux/dma-mapping.h>
    ( ?/ R9 k4 s7 z, {) I2 u
35. 
    * |/ B/ |  ]3 a2 K+ O7 K8 g/ h8 m
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    # c) k  R  K) \5 f0 f
38. #include <mach/irqs.h>
    5 v+ [5 P- B! S+ m" F
39. #include <asm/hardware/edma.h>
    ! t' ?, s; l' O. _- z% e, \/ n
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    " A$ J& ]6 S6 F. O  o2 w# a
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__)
    / S8 L/ z) W4 O' `) @2 i$ r
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    8 l# V" y7 h1 v
51. #define DMA_FN_OUT
    $ y8 F9 ?1 o6 m0 d, f
52. #endif
    
53. 
    1 ~% ^2 r- Y9 Y5 \
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 g& t. ~* ^8 K+ W! u$ O. Y& O* n: d
60. 
    ( S. U6 X/ S2 B% \
61. static volatile int irqraised1 = 0;
    ( v2 H/ g# P6 x% |* G
62. static volatile int irqraised2 = 0;
    6 }. k6 i, b9 j- B
63. 
      K: a1 F# T( D7 G% l; ^6 W
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);
    % @: `) c' d$ W7 g# s
67. 
    / q+ Z, H. d) C5 b
68. dma_addr_t dmaphyssrc1 = 0;
    % `6 S& T3 _* Y
69. dma_addr_t dmaphyssrc2 = 0;
    4 U$ h4 o7 B) ?- a- _$ m4 g
70. dma_addr_t dmaphysdest1 = 0;
    ' R, G7 t2 c: K! r# E# S$ K
71. dma_addr_t dmaphysdest2 = 0;
    & o; E# l; T1 ^5 J5 P8 E
72. 
    0 f. b- l# g1 x6 e6 B% Y* i
73. char *dmabufsrc1 = NULL;
    . D% ^, ?! @/ a$ ^* l
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    * c' C7 ~5 z/ v. P  d
76. char *dmabufdest2 = NULL;
    
77. 
    * r' ]' |: G8 X8 _' ~
78. static int acnt = 512;
    
79. static int bcnt = 8;
    - H7 g0 M& {8 ~8 m9 O* S5 H
80. static int ccnt = 8;
    
81. 
    + Q4 _4 P! V( _2 F+ F+ t
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    8 _# ^- g1 k& Z% r4 y+ H
84. module_param(ccnt, int, S_IRUGO);

复制代码

& V4 c. g! X4 D' E; N
      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
* I5 U9 `, h2 a, karm-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。
' H3 \# a2 x% l  Q     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 p1 H" S3 i: R/ B3 K' T

. U0 X/ {; E) A) S% G