OMAPL138如何在Linux下使用EDMA3驱动

yyj

' C6 b8 m6 [# T4 J) ?) H7 F

1. [code]EDMA sample test application
   ) K3 A8 @! k6 F0 s
2. /*
   % [  K& K0 n, E8 N& u& {; M
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ' Q% Y" t% E% u; W7 T7 F2 J
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ) n0 a' H0 Y4 u" P! h, }2 R
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. *
    * W2 Z1 T' W+ u& S" m
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 `! G; s2 j7 c
14. *
    $ ^$ |; t9 L, X- N9 }& d. I
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
    . b" T/ R! ], ^+ k2 `% J
17. * published by the Free Software Foundation version 2.
      C8 q2 P; C! w6 @0 O
18. *
    : x% e% E: @, R1 o4 K
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    8 i- |2 d" c9 P6 W# F
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ! Z4 d7 G) m$ R! j* P
22. * GNU General Public License for more details.
    7 w$ f7 p# f% ]& G" P% \) U0 Z/ {
23. */
    % n8 E- w$ J+ E, m# ?3 Y- p
24. 
    
25. #include <linux/module.h>
    7 C' h' f1 ~  A" t  j& G
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
      H0 w1 r5 K. c+ B; z% P
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    : F) ?% f3 Y5 ~7 s3 Z
32. #include <linux/sysctl.h>
    ' L) D5 |! g7 G- U5 C/ m/ y% d6 y2 s
33. #include <linux/mm.h>
    0 X4 t9 v  P& k$ D
34. #include <linux/dma-mapping.h>
    
35. 
    8 x( ?+ A$ I+ _1 p) z" _, a
36. #include <mach/memory.h>
    1 V- @% {3 a. j) r( d
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    $ d- }, i7 f1 }$ {6 l& P% B* i
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__)
    * F0 ]( c$ O# ]" W3 W
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ( }+ J0 y' H+ T8 Z( E& ~% S% j( v
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    * y+ s# B5 `2 l4 t1 b) _# i* g
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    , T6 a- k) Z0 g9 _. j5 N  s
58. #define TCCHEN_SHIFT                22
    ; p: i0 {, c+ y4 d6 r- y
59. #define ITCCHEN_SHIFT               23
    
60. 
    ! w% z9 Z0 t+ o0 X8 w3 t. ?5 P4 i
61. static volatile int irqraised1 = 0;
      ^7 S7 w+ }, |$ N
62. static volatile int irqraised2 = 0;
    
63. 
    
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);
    & _, H7 E5 n, n1 I! i, n
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    $ U( T$ W) o( c. c# b
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    % y4 d4 `/ D# O5 j# i+ y! a
75. char *dmabufdest1 = NULL;
    : N$ [$ K1 o3 j* }* E
76. char *dmabufdest2 = NULL;
    
77. 
    3 }& s( q. b2 d  r& H( Q
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    . I- ^% U* o4 `0 ^
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

      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
1 j) l3 s9 u9 \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。
9 ?+ y# c  ]/ n" B7 A" H9 k