OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   . g$ q% n3 h& L' s' p+ H3 L
3. * edma_test.c
   & W& l8 F3 p$ f( h6 C7 c$ u
4. *
   
5. * brief  EDMA3 Test Application
   & a2 z2 v: y$ o  J9 |
6. *
   
7. *   This file contains EDMA3 Test code.
   * X' O' A% I" a0 O+ U
8. *
   ' b, K% ^, O: y  L
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. *
    ! `2 M2 Z4 }+ O5 P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    * ~9 y+ u8 Z6 U# B  r; r+ ]5 U
14. *
    8 D8 ]7 h, \2 k" ^* U
15. * This program is free software; you can redistribute it and/or
    ' o. `* v+ a2 r" @
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    2 w; G5 G; E- H  i9 V7 f4 ~
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    4 d) a4 l  W' [& u7 \% I' \$ L' ^
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : p# w8 m6 N2 A) X- h9 R5 U6 N8 u( _
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    ! Y: R, Q; ]9 @, p# L: X; X
26. #include <linux/init.h>
    + u4 B4 \) H, S! c7 V6 T
27. #include <linux/errno.h>
    5 k( \9 `# I6 b+ Z% l# r  i
28. #include <linux/types.h>
    2 Q" a* S6 n  v' C+ S7 w. \+ A
29. #include <linux/interrupt.h>
    1 F0 n: l0 v7 l( U; X$ `( Q, ^
30. #include <asm/io.h>
    7 U1 c4 e6 b, V  m7 b
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    1 N3 c7 {* M" q# U& B/ |% N/ O
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    , j/ b& e: Y* p6 }# w
35. 
    - |$ L, W2 C5 |" F
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    6 [5 ^) o1 O# F; n0 w, V
39. #include <asm/hardware/edma.h>
    
40. 
    + k2 S  _! T; c' T9 ^
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    " t. M" R3 @* q  b! a: ]: m6 l1 T: M
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    6 s9 \+ f# Y& p' i- W
50. #define DMA_FN_IN
    7 h, Q: t) R) z/ q5 n
51. #define DMA_FN_OUT
    , M+ P" q9 V$ r) J" G* o5 {: H% h
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    6 u- P5 S) a+ f6 E
58. #define TCCHEN_SHIFT                22
    3 |8 H( m. a- M) r& ^- k  q
59. #define ITCCHEN_SHIFT               23
    
60. 
    + ]; {7 ^( t8 s+ }  E
61. static volatile int irqraised1 = 0;
    6 `; C* ~4 ?0 P" k! ]
62. static volatile int irqraised2 = 0;
    * P$ C8 g2 Q( z
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : N  X. I$ D9 f7 r. Y
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);
    ! E, S+ r  X- J( d- |
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    " R: ]0 M6 q2 P6 I
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    8 K, _7 y1 S) W) a  Y1 p
73. char *dmabufsrc1 = NULL;
    $ P( ~% X6 w+ Q- G. o
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    + K! d, C1 _, C* b6 W2 h
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    & q. m4 [1 Q, _, T$ F* i
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    # y1 k5 o6 B1 [& w& r1 F4 ^
81. 
    0 e% C6 Y/ ~6 S8 t( P) n
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

$ ^" F, D( K% a0 `$ A      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
; X: E  q+ C3 x! Oarm-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。
2 s5 l. F/ e' F+ }  `

' G0 s: Y9 K% d! C