OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 @7 d9 T1 h5 ^8 T& t+ d; ]- B7 w

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   3 |7 y6 {# I6 m# Y8 K
4. *
   / i/ J' W. d4 ]$ O5 O
5. * brief  EDMA3 Test Application
   
6. *
   4 A: q; c$ A5 K! v7 H% y% |9 c
7. *   This file contains EDMA3 Test code.
   ; H$ Y+ h4 ^8 d% y# [& \
8. *
   . K# u) J) }# u7 a: f# t0 ]4 i3 i& I
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) |4 e: }5 z- s6 t; K, G" @
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ) [1 G4 @* o7 \3 h3 M$ I
11. *         TO CHANGE.
    
12. *
    / ]! }" T' l$ J2 b- _7 \
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ) Y' u( m4 J3 U
14. *
    
15. * This program is free software; you can redistribute it and/or
    3 `5 x) ~6 }8 ^3 }! n! G
16. * modify it under the terms of the GNU General Public License as
    8 U9 D4 f) `# p! R- J
17. * published by the Free Software Foundation version 2.
    
18. *
    * d! N& c, d9 _/ D3 D  N) V
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! m3 `$ m' A% T$ F$ Y& ]8 g( B: S
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 [0 [! S/ z) X$ ?' ~( X1 k5 o& K
22. * GNU General Public License for more details.
    
23. */
    8 D0 Q2 I; ~- j( M; B9 O/ t
24. 
    
25. #include <linux/module.h>
    - p0 ~0 }3 z+ b% V  h& ^
26. #include <linux/init.h>
    + F8 Q. v6 ?% u& l. E# {
27. #include <linux/errno.h>
    . T- @: E5 A, H9 s
28. #include <linux/types.h>
    + X) \- }  b/ ~& I
29. #include <linux/interrupt.h>
    ; H8 j6 _- V3 N  H' \- O# r* a
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ) |2 s, M' y8 |' ?* Y
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ! B% A1 b, {9 P5 X0 e
36. #include <mach/memory.h>
    " C8 C5 `5 o' c' }' e4 _& S
37. #include <mach/hardware.h>
    5 u0 Q4 S+ t0 }, G+ ^" u/ p
38. #include <mach/irqs.h>
    3 {( r7 K3 C4 F, F9 D
39. #include <asm/hardware/edma.h>
    ) m; E  P) Z; F1 O6 N
40. 
    # e( b6 U# W4 L7 Q- s
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 M7 f8 T2 ^7 j, r
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__)
    2 f1 H  n, v+ f
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    + _( X' c& h' A( o& e5 }
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    5 r5 V" k; E! S# V4 Z0 w0 B6 n
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    / ^7 p3 L4 U( Y6 d' B% v# `
61. static volatile int irqraised1 = 0;
    1 e* ]( _/ O) l$ A% ^
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    * P; ?! r0 ?# S$ }: h2 D0 c
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. 
    ! t. ~3 P3 \7 w# [6 u1 Q' j, e
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    + t: L% U) S* }; F9 `9 |
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    " Q  N! o: K0 @, e& C7 I
72. 
    2 W: t( G- h1 K, A7 b9 ]" t
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    1 W1 R. _2 E  @# K
75. char *dmabufdest1 = NULL;
    # A1 y* a5 D9 q0 ^# X" k/ Y
76. char *dmabufdest2 = NULL;
    
77. 
    ! ~; {( O# u& N8 x! Q7 x* s* q
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * v, F- b/ \; r  L0 \( E
80. static int ccnt = 8;
    
81. 
    - e9 f, f& k! `
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    . `1 }- y8 i# U- [  q8 m3 K
84. module_param(ccnt, int, S_IRUGO);

复制代码

( j- V! L8 H( O# L& E      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
" U, W$ W8 }% X& w1 Q3 _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。

% h! P  D4 {; a4 }  O& W/ h8 V