OMAPL138如何在Linux下使用EDMA3驱动

yyj

: K/ U+ u5 I* W

1. [code]EDMA sample test application
   
2. /*
   5 \' `# ^, m: R
3. * edma_test.c
   
4. *
   ) D2 }" d: h- X3 \6 L: l  g
5. * brief  EDMA3 Test Application
   
6. *
   / q; p! w% d! \- }& [7 d" w: ~
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . [$ d' \, {* T; j! m" B
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
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
    
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.
    8 L1 F* y/ A8 d% f7 V0 k4 A
23. */
    
24. 
    " ^" y$ g# _. p' G- ]1 I
25. #include <linux/module.h>
    8 {. ?# G* P" e0 n2 Z
26. #include <linux/init.h>
    # V+ _1 O% I0 E- E9 u
27. #include <linux/errno.h>
    4 i1 N! X3 `: ?
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    . t6 p) M' W$ I* ^! m' u
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      J. X$ K5 ]; a$ _- s, }+ N
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    5 f; E) C* w" h
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    % l. U8 w- R& a  O! s* U; m/ ^4 G% W- N
40. 
    6 Q( B) m1 O8 {3 `; p5 T2 [1 n2 D
41. #undef EDMA3_DEBUG
    # ]6 [4 q  z" J3 {3 R. i/ e
42. /*#define EDMA3_DEBUG*/
    
43. 
    , {$ v- y% w( P9 n4 D; M: h! D) H
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    4 X3 l2 R& E7 S3 ]) }& m1 t
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
    5 T1 h3 L- w" @3 m) L
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    3 N2 V$ s, Y0 ~$ W1 B3 o
53. 
    - L1 j& j* b& l: Y5 O
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    5 Z( o$ \7 I! W7 N( w) ?
57. #define ITCINTEN_SHIFT              21
    % ~2 _4 d$ E: A' E, f3 Y
58. #define TCCHEN_SHIFT                22
    ) d9 [* x, w) t+ J
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ; \+ T3 A  }# O0 T, p
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / u# Y- P/ i0 o* C
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; ]0 l+ i$ \+ v; G8 C4 A
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) y7 G! V2 q+ z8 e! s
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 T, L# }3 a' p8 Q) J; ?
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    # r( C! U+ F2 \0 A* w! Q- z6 R  c
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    & K# N4 {8 H  T) o- B8 m
78. static int acnt = 512;
    
79. static int bcnt = 8;
    4 S7 F& ?  G" o% T
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ( s# W6 f1 _+ [
84. module_param(ccnt, int, S_IRUGO);

复制代码

8 ~7 M3 c9 s  J
      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
/ a: Y/ J5 g% H' [- \% {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。
2 @! h' c" T! r" j! M& I     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


* q% ]- a0 ~/ u% Y/ z4 n