OMAPL138如何在Linux下使用EDMA3驱动

yyj

' P, }( V1 F$ x; y9 X! R. K

1. [code]EDMA sample test application
   
2. /*
   1 G" K& w: k, d8 O6 f1 T
3. * edma_test.c
   ) E5 k4 @# }& i7 |; ~: _
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   6 q" ~) R) d& {# Y. Y
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.
    
12. *
    4 \8 P6 M4 M" b' N6 V
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    1 l/ K6 B7 [" z3 Q" \
14. *
    . v% @: t, N! _
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    / V0 \6 d5 E4 C4 Z- @
17. * published by the Free Software Foundation version 2.
    
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
    
22. * GNU General Public License for more details.
    
23. */
    ' a5 K' G% c4 m2 ]4 ]8 ^9 o
24. 
    . M. ^9 {# a8 j( J* E$ ^: B! r
25. #include <linux/module.h>
    - W) b7 w( V) Y
26. #include <linux/init.h>
    6 ^2 r& O# p4 m2 o- i
27. #include <linux/errno.h>
      \5 E& q% V/ V1 l
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 |. a8 B) ], J# S) W+ s% i
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    1 {0 ~4 Y9 u3 `. V
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    . f* `' x- m/ P
34. #include <linux/dma-mapping.h>
    % D9 y9 J& T. K- S5 F
35. 
    ! g7 v+ r) z7 q, c- t# S
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    . T, m& Y. K5 s
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    $ Z: Y5 W5 y+ @
40. 
    4 U" @/ P2 c. f6 `
41. #undef EDMA3_DEBUG
    0 \* j" h7 q' Z& J+ L5 ^1 }
42. /*#define EDMA3_DEBUG*/
    8 [( X) o3 L  _( L8 r' Y; l5 ~! _
43. 
    ; ]( o& P& S5 X9 T: _6 |: Z
44. #ifdef EDMA3_DEBUG
    6 S7 y* M4 U% h1 D
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__)
    6 d8 x3 z+ m  a
48. #else
    
49. #define DMA_PRINTK( x... )
    1 @2 b- H+ ^; R; s$ R6 [) u" _
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    ! a5 J3 m- C0 q! w9 A- Q, {
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 [# a  x7 l4 L3 ?2 L! o) T5 T
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    - K$ S2 D% P7 W. I% V
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    + p2 @( `. u  B- U& y- ]
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) l# t: h/ G6 i
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. 
    - I+ }/ Q8 F9 q/ G
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    : ~$ Z' V9 h, ^
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ! V$ o# k) `) V
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    1 ^* i& {, t+ N" n* y
75. char *dmabufdest1 = NULL;
    3 V4 W# d' P" ~  o7 {
76. char *dmabufdest2 = NULL;
    9 F; M3 h3 x& ~9 o$ [
77. 
    $ G* J+ R$ g+ y8 P* P& \
78. static int acnt = 512;
    0 G1 R8 a* Z$ l* M) H$ V5 I- f
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ) `8 V6 ]# G; u4 |; @) H9 R
81. 
    $ Z4 \8 x: a7 P" Y' Y5 h) L
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

* z# B9 L+ A* P
. h8 E3 O& a; x& M* O, e8 D      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

4 x* e  r# Q  I7 V0 \
0 P: f7 x* T( \. n9 T4 E% b' f