OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 [- [, p  t+ y$ V8 m

1. [code]EDMA sample test application
   
2. /*
   ! J& X) z& n3 i  U+ i  k& Z2 \( B
3. * edma_test.c
   1 K. x+ t0 n/ a& S- b
4. *
   5 s# ^5 \/ v: a7 s
5. * brief  EDMA3 Test Application
   
6. *
   
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
    
11. *         TO CHANGE.
    
12. *
    % ]& D+ ^' B7 v% s7 e* F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 R/ C1 Y( j+ M6 t
14. *
    6 b" m& L+ P9 {# g  {1 n8 b
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.
    4 x) O" X! q& v/ k4 }
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
    ( a9 l- R+ X3 j& }3 _+ W! ~
22. * GNU General Public License for more details.
    
23. */
    ; n& b: \. p6 i) `7 d' g: I
24. 
    
25. #include <linux/module.h>
    . C- u5 N! n1 Y; Q1 V
26. #include <linux/init.h>
    5 P8 k& o; R# Y0 E' X2 v
27. #include <linux/errno.h>
    & W$ ]7 L. F) M: E9 m& A* K& Y5 o
28. #include <linux/types.h>
    0 D+ h0 b7 D9 _, x/ z6 V
29. #include <linux/interrupt.h>
    0 ]0 t2 {9 S8 {! [0 Z
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    $ s  Z9 z, V+ M. A1 t
33. #include <linux/mm.h>
    ; r! }& s4 ~! `# _
34. #include <linux/dma-mapping.h>
    , {! \$ @2 K" e* l& w! S
35. 
    
36. #include <mach/memory.h>
    9 Z: Q/ H+ K2 n3 z1 h% T
37. #include <mach/hardware.h>
    + D" d( B. y; j# W8 J2 @
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ; H/ y) r& c& {6 W! I! N% a% z; r
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    1 e+ b  g" A, U* Z
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    + m& ^6 J5 _7 S0 o
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
      o; ^: r8 m& T, Q  X+ {7 x, K
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % o- C4 q% g# c! |7 `& B
55. #define STATIC_SHIFT                3
    9 O! c$ I6 N" G# {1 N9 h+ n/ b! ~+ g
56. #define TCINTEN_SHIFT               20
    & A* D  f) C3 R5 q3 B4 A" q
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ! U9 X$ [, I3 n8 Z* v5 @
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    + w- P4 H0 _: B; H) V! J
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);
    
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;
    , Z, n  ?/ a6 {+ }/ k- g
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ; g# B+ h/ J) @8 y5 q" w- Z
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    . L0 F6 r8 w* t
78. static int acnt = 512;
    * ^' m  k3 T+ ~; F: P2 B3 _' b
79. static int bcnt = 8;
    5 L& O4 E' ?5 C* _- V  u' O
80. static int ccnt = 8;
    
81. 
    , L" f3 K) `" y% t! G6 A# L) X' U
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
+ F: }9 s6 T  L/ e/ Barm-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。