OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   " B4 E3 ^6 K% M$ x
2. /*
   
3. * edma_test.c
   7 m. R5 f8 ]4 e+ _. S: ^
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   1 \" n" t6 P# p' F# j% X4 ]
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & d3 ]6 K% b( x
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    + u- |0 r# o( e% h; b
11. *         TO CHANGE.
    
12. *
    * D- U. o8 w  N: ^
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * m) c  a1 U7 T3 W% Z
15. * This program is free software; you can redistribute it and/or
    % O- ~6 d" m0 Q  s
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    $ ^0 {7 l) Z$ q. B
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    3 d6 u3 ?* Y4 e% D" [
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ) c6 ~: A- P2 {- C* P7 o
23. */
    
24. 
    
25. #include <linux/module.h>
    ) k+ K( `1 c) t
26. #include <linux/init.h>
    1 a4 L9 D# G. C: E/ r; T
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    9 g( `' r- M$ c8 K' d6 W' h
29. #include <linux/interrupt.h>
    2 R% F6 t' ^4 A0 x5 ^) K  G
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    / W+ O# D, ]8 V7 |
32. #include <linux/sysctl.h>
    * [  w: L% ^6 w- o. C
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    # M' w# E( R! d; }
40. 
    6 T  I& r9 b7 K! F6 j
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    * c& {# ?. R$ f: o
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 O6 t3 W  o5 E4 S: O( H& v- R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' ]8 P/ {% w: ]. Q7 i
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ) f( A2 q5 |  [- l- a1 q: w
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 ^/ r9 p4 ?. t. r0 k' b1 O7 R
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    7 R% l9 _. s8 a7 X
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    / P. ?% J; l5 r* `9 c9 ^5 E& L
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);
    ' H, N- ?/ M. X
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;
    " m7 A3 \! ~% l, x3 L
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    # M, ?2 I9 W$ ?! Z, V
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , ^  w# D; `2 z- H1 A' Q; B* Q
77. 
    & l% k" v. n9 e4 }
78. static int acnt = 512;
    3 c# B6 e- N9 b7 \. u' v2 r
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    9 ~1 v8 H0 u* i) W+ \0 b, J0 d2 ]
81. 
    . ]% X; w: i  O. W; r7 `
82. module_param(acnt, int, S_IRUGO);
    0 s6 P/ O1 N# a5 P. ?
83. module_param(bcnt, int, S_IRUGO);
    % C+ V9 u" W* u% \0 r2 \6 H! T
84. module_param(ccnt, int, S_IRUGO);

复制代码

- q4 J5 P8 i3 f. V. B6 J. r) O
) F$ n" L3 W' q      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
! D. b! o& d5 darm-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。
7 ]7 a8 [3 \1 C3 V" Q
: s7 H+ L. h/ M! c
; {% D: o  e8 [* n# \+ G