OMAPL138如何在Linux下使用EDMA3驱动

yyj

3 X* w3 D; p# A* c0 m

1. [code]EDMA sample test application
   0 ~3 ]" i0 ~2 b: K! E1 g, i  H
2. /*
   0 b0 U; z' _, X" W3 p9 [
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   . _5 |) j# U, M! O( I, e  u
7. *   This file contains EDMA3 Test code.
   
8. *
   # b7 b) m/ z9 }; X# ~4 e
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
      Z( p7 k5 ]/ V
11. *         TO CHANGE.
    4 E  f; s7 D/ n" i
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
    ; z1 Y5 `  A" H' d/ j8 C
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    0 L2 `2 t7 T  F0 }- Z
18. *
    ; K) u9 I+ \5 ]2 g3 U
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 w* O6 {8 O3 B! ]9 p( f
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ' h: X1 d3 o$ _! Z$ \) |
22. * GNU General Public License for more details.
    
23. */
    * o% E5 C/ ?* G4 [% S( g) A
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    7 `* o' v3 [/ u0 E0 ?7 n$ h' ^
30. #include <asm/io.h>
    . T1 J' N: W, T) ]
31. #include <linux/moduleparam.h>
    , D. N1 J7 Y' o+ R$ @4 T* p
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    1 `$ i: Z8 T& G- [% ^5 n% A# o8 K
35. 
    % {+ Z$ u# }) B$ q8 f. t
36. #include <mach/memory.h>
    . B6 b' {$ F( \6 B3 c6 e
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    / \- A( C1 x2 G& c: n5 T1 t( b
42. /*#define EDMA3_DEBUG*/
    5 }" @1 L# h3 a! m( ]
43. 
    ( W4 b9 P& g) R0 z
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    4 z+ [0 {' x8 K2 k- m: R+ |
48. #else
    & N6 Y8 G, G* Z2 g' {3 u
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    $ z) q$ V" O5 G# h4 }' Z! P
51. #define DMA_FN_OUT
    
52. #endif
      ?9 i" v$ A6 Q; F( a3 k$ H+ h
53. 
    , r4 L' A2 }) N' a3 T. h( Y( z
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    6 S$ E/ S% ^! d0 \
55. #define STATIC_SHIFT                3
    8 E, A7 C$ m. O1 y
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    : X. L* P% Q' `1 d6 v% E( A
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ! A* n# M4 L/ U( ^) s, P- G# d
61. static volatile int irqraised1 = 0;
    / i6 J2 s3 r& B4 G$ n
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - v' g# T8 [: t/ @
67. 
    2 t/ k" w7 d3 p( A
68. dma_addr_t dmaphyssrc1 = 0;
    ' ]: a2 @; M# c
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    5 H- _% \0 O- w  I. h# F. S
72. 
    4 g" N- h2 O5 J7 C: C0 O8 |
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    + y" Z! ^" x3 b: u) E! V) d1 k
75. char *dmabufdest1 = NULL;
    ' ^0 k# v9 F) O
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    * n# H: w) W/ X& Y1 q
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    , S- k6 n9 C& R  X
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    2 }4 h: A, t* j; M- w
84. module_param(ccnt, int, S_IRUGO);

复制代码

' |$ q/ s! j# f6 J) u  K$ `
5 N1 o2 G) y6 @8 o6 O" C      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
& ~+ c5 ^0 w; c. T, n+ Harm-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。

0 e: m. R$ C9 t! I4 ~/ E+ Q3 g
% N: j- e/ @3 ?! s) j& ?; ]