OMAPL138如何在Linux下使用EDMA3驱动

yyj

3 {9 h  g- _7 A" z8 R6 `+ c

1. [code]EDMA sample test application
   
2. /*
   0 r* x+ v' J+ @3 D- z
3. * edma_test.c
   4 r) }4 z  O! a- ]
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   " l# I/ O7 T+ l* l# {8 L* M% V* G
8. *
   ! r* X6 s( y/ v) B7 Z
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
    ' X- @3 W& F( N& U4 p
11. *         TO CHANGE.
    4 q/ I4 y! U9 [% a0 f
12. *
    + K: F  N! ?1 Z; A
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    + J1 J# q8 T; P
15. * This program is free software; you can redistribute it and/or
    ! y' `" _9 W3 O+ f" G
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
      U5 j7 C# Q" @6 I) e) w& V
18. *
    - _- L6 |4 }5 I$ q( K/ x* D& x$ I
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' Q( @$ v: S6 X2 e9 Z$ s6 G1 d
20. * kind, whether express or implied; without even the implied warranty
    # Z8 s) }$ F. W
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    - E& r& @' K! t) A! M# k" i1 t/ l* I
24. 
    ) q' u+ O: Y3 r/ c7 }# f% b
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    , D6 D9 v6 b) r- L$ ^
27. #include <linux/errno.h>
    " O  k8 g% i" Z. x
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    8 d  k) x0 J" k  T
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    : X" }& e1 b! Z3 Y8 ?
33. #include <linux/mm.h>
    2 Z$ y1 |+ H3 y4 v/ j6 w
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    0 x; a2 H( m8 @! _  z& r
37. #include <mach/hardware.h>
    1 s1 N$ e/ v7 e' _% A
38. #include <mach/irqs.h>
    3 ]" }$ Q: u. o( \, R1 h
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    0 j4 w( I2 @4 o. H& o
42. /*#define EDMA3_DEBUG*/
    
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__)
    / Z. H% a/ j1 W2 \, Q1 F- c. c0 a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    + P% m$ |; M6 \# c* r- {
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; T1 Z7 B6 O+ b+ r* c* u! \
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    3 R5 r8 U+ B9 k4 v
55. #define STATIC_SHIFT                3
    " \. I8 G- r7 l+ X8 N0 r
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    7 b; Z( j% n, }) O5 O5 z8 W
58. #define TCCHEN_SHIFT                22
    2 ^7 R2 ]9 I& q1 W5 ~' @
59. #define ITCCHEN_SHIFT               23
    
60. 
    $ W/ R+ l' U& h: N+ P) F; `5 ?& q
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ) L6 Q5 H- L6 _: N2 [: T
63. 
    & l  s! P: g4 o# V9 A9 K0 b" q
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);
    0 G% j. Q! [  M
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    : z& O1 B9 F* x0 V! l
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    : n. X8 Q% B  B! k
70. dma_addr_t dmaphysdest1 = 0;
    5 e2 c6 z( I7 L4 L9 h
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    * y/ }2 @- U* j$ P* l# S9 {
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    / Q0 s  X' T8 K) b2 L) [5 [) D
78. static int acnt = 512;
    7 M; _8 Z' d/ |5 g' j/ t. y! H5 e
79. static int bcnt = 8;
    6 G% |/ s4 o+ e# O" W9 Z0 ?, f
80. static int ccnt = 8;
    8 V5 c5 v  v) e( {: [# v& }
81. 
    
82. module_param(acnt, int, S_IRUGO);
    9 L" x7 t3 A7 _& `
83. module_param(bcnt, int, S_IRUGO);
    9 D$ p6 Y# m) m( I% `% S
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 l+ h  U; Y/ d1 Z5 E4 n" J2 F      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
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。
     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 \5 c2 ~5 F- r