OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
     ?1 n- R# |' r! y8 x
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
    : j) M! D/ a( j7 W; k
11. *         TO CHANGE.
    
12. *
    5 j- s# a% Q, u: B2 i$ v! F
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; Z# j& w4 A! B
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
    / o  W! H. k% r  Z$ t* a% |2 S
17. * published by the Free Software Foundation version 2.
    " k" Y# v- U6 _, f, c) l' p
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ! {, {. F. F4 W/ W4 j2 \: k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    4 b0 w4 Y6 ~) D2 P* k9 p
23. */
    
24. 
    8 U7 P  R0 X7 ~+ K0 x7 E
25. #include <linux/module.h>
    : Z( o' G  I: M& [; X9 p$ w+ E0 d
26. #include <linux/init.h>
    
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>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    7 D1 g$ d* `6 r# \# \! w
34. #include <linux/dma-mapping.h>
    
35. 
    " K4 S6 p/ g9 L* z
36. #include <mach/memory.h>
    6 D0 {# L: v1 B. g- N2 S
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    / S" P* u9 e+ |- O: j( S5 j
41. #undef EDMA3_DEBUG
    ' S' B7 O* W3 N. I' T- u
42. /*#define EDMA3_DEBUG*/
    ( o. U! p; _+ h4 F# L" p
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__)
    % P8 w& J3 p3 S+ J* O
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + \  Q5 R; n  ]
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    9 c* m7 _5 }  B2 n* `9 Y
52. #endif
    / r# k9 `. t. p
53. 
    $ ]$ H. A: I" ^* J2 r8 m
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    / D; ^) ~, Z9 U/ k! F
56. #define TCINTEN_SHIFT               20
    ' H$ }% G. R6 I7 N0 \6 B
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ' V' H# {3 j3 J
61. static volatile int irqraised1 = 0;
    : S: v- ]* d1 |
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 z2 n: ^* {; B- S) j7 p
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);
    # l5 m. e; B5 r, P0 f4 m! m
67. 
    ; O* _. b. H( C8 L1 ~5 H$ k
68. dma_addr_t dmaphyssrc1 = 0;
    $ ~# H6 r& \+ Y% g9 D
69. dma_addr_t dmaphyssrc2 = 0;
    / E4 z  `+ G' _" k; `) z
70. dma_addr_t dmaphysdest1 = 0;
    3 O% l" ]. W1 M4 Q
71. dma_addr_t dmaphysdest2 = 0;
    2 {  F, {, Y" q
72. 
    $ V/ Y: _9 }. s+ |& d4 \* H, W
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    + H# v& {# K; h# g5 Y0 E) l# O" t) Z
75. char *dmabufdest1 = NULL;
    / q- h" {0 `3 C& p9 D; D
76. char *dmabufdest2 = NULL;
    
77. 
    - M& q& Y; [) b# Q+ w
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 _5 V. B' ~& e, J
80. static int ccnt = 8;
    
81. 
    . Q7 S* J  r" `
82. module_param(acnt, int, S_IRUGO);
    ( `0 Q$ g: ~" ~
83. module_param(bcnt, int, S_IRUGO);
    3 G1 j- k4 s( v0 b1 j5 R
84. module_param(ccnt, int, S_IRUGO);

复制代码

0 U( W" }1 L; E, @7 t! e
; L1 l: y) G; ]  Z/ G2 p      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
6 }/ H! r3 m5 P/ ]+ sarm-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。
3 ?( v+ K" g5 ^6 n, }1 w     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* s2 n( D* w& Q9 @# A
% }0 w+ G9 q. i3 V: n1 k6 H/ n! {
8 \5 F* I; H, D