OMAPL138如何在Linux下使用EDMA3驱动

yyj

% U: M% J7 W  s+ ]* t

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   8 B. u8 Q. n* ?  z( u  @! Q
4. *
   + w5 k8 `$ h" c/ F3 d8 Q! P; u
5. * brief  EDMA3 Test Application
   
6. *
   : t; b" ]( H& |( o* j7 ~" G
7. *   This file contains EDMA3 Test code.
   
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
    ) A3 l$ p) R+ a- I* f% F  Z
11. *         TO CHANGE.
    , E! ~- b: r' F/ M0 A
12. *
    " n# Z5 i, F: a' H' b
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    % K' V( n4 f: y! e' M5 x5 n
14. *
    
15. * This program is free software; you can redistribute it and/or
    ; w1 C8 d7 ?5 L+ T" n6 C9 d; `7 V4 f
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    ) ?+ e9 r, R/ D1 U, N/ B
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    / G6 }# u1 W% q- S, w
20. * kind, whether express or implied; without even the implied warranty
    3 e5 K' t/ C$ X4 x' n: ?+ k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    3 V" B8 H+ G+ G! {' v4 e
22. * GNU General Public License for more details.
    ! e8 a% {) M8 {$ s5 Q) Z* Y
23. */
    
24. 
    ) u1 P& h" H7 }) a  m+ Y8 R7 L7 H% y* D
25. #include <linux/module.h>
    . U2 D, b- \3 d" X' d$ f4 }
26. #include <linux/init.h>
    & ?5 x7 P. \7 Z' B* m) p3 o8 {5 a
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ) s* P- C& V+ C
32. #include <linux/sysctl.h>
    % Y% Q  s+ s/ J% ^$ S, l: w: o% F
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    2 r9 B4 L. g' ]7 ^: U3 A, L$ h9 E" i
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    , p* @. R# Z! @' b
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    ( [7 o; _. k# x& ^
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__)
    # F5 M$ t! i& k3 ?/ Q  S7 {
48. #else
    
49. #define DMA_PRINTK( x... )
    $ ]3 q0 a6 {2 p, \3 h5 |
50. #define DMA_FN_IN
    9 `/ e* O( U) c4 M8 D& ^
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    9 V2 O1 \* M! p2 k- ^6 J# r
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    ( h, E: H3 M) @6 |
62. static volatile int irqraised2 = 0;
    
63. 
    8 H( ^# @) u4 [
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);
    : P$ w5 D1 `2 C" T
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    # M; @& o: i: _
68. dma_addr_t dmaphyssrc1 = 0;
    2 H; C* q5 e7 f: ^
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    , N6 G' e8 Y3 }$ U; N# f' R
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    " _' f6 C/ \* q. w$ h7 f, r( v
73. char *dmabufsrc1 = NULL;
    6 j; R3 }# j5 T
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    " i$ E$ z' x* y: r6 Y& i
77. 
    8 I  N2 C+ n  n( _; T
78. static int acnt = 512;
    
79. static int bcnt = 8;
    7 ~2 c) H' h2 y/ y5 O* p/ z% m* [' D
80. static int ccnt = 8;
    $ @) ^4 d. i* m# ^! c
81. 
    ( R4 l6 a$ P' n1 [
82. module_param(acnt, int, S_IRUGO);
    " @& a- ~' o/ h
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

" O% \) {( O+ t% d' ?& i6 b      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
# R8 w2 `, A% v2 Q  H8 Z1 O0 G: tarm-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。
1 l1 C$ H% s5 H  o

' ]/ B6 ?4 T7 P* m% V! i