OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ R/ W7 Y- I9 k; R1 K% |8 p

1. [code]EDMA sample test application
   8 r& n# I, y6 W2 Q
2. /*
   
3. * edma_test.c
   + [& R2 v) U% s' N7 m/ ^
4. *
   9 t9 Z9 o) q7 S3 I! F  u, r  k
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   , D5 _  R/ F0 h
8. *
   9 `  r# A' m( C# Q4 [, M
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
    - k9 _, Z/ s  G# K9 P/ r9 C
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ( s8 ^6 H- R0 `; P1 R
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.
    7 a: g; c; j" @& E8 [
18. *
    9 Z' \. G0 `$ r; N/ A
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    . A" i0 F3 i5 L( S. ?7 R
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    , |; }" @3 W: X; S2 S2 D
24. 
    : R7 ~; f2 y0 G7 U
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>
    4 E# F' K6 Q# Q
30. #include <asm/io.h>
    3 n, r, q8 W+ V; p+ B9 ?! K6 M5 O3 e) N
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ' M" F; i# K2 y5 J) ^& s
35. 
    ' g/ |# K5 u; q' f1 \4 z: \) A
36. #include <mach/memory.h>
    ; b) c( ]7 b! {6 x: c
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    3 T( h5 U# M9 l8 y- ^$ ^; [
40. 
    
41. #undef EDMA3_DEBUG
    0 z6 i9 {5 K, V4 g" Y
42. /*#define EDMA3_DEBUG*/
    
43. 
    $ F. E8 Z; z! C2 V3 y
44. #ifdef EDMA3_DEBUG
    ) t0 G0 |7 |& m0 X- G8 U6 w
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__)
    ' a0 Z8 X: Q/ t4 {
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    6 s2 R% R4 d6 H  ^3 b2 A6 u
52. #endif
    
53. 
    " [7 J5 H* I. f& S' E6 v
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    # E  I( X7 A( B  x* N
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    7 F; L" @, q: Q7 }
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    * H$ i. P" p* ]/ ^" @' U
59. #define ITCCHEN_SHIFT               23
    
60. 
    ) |$ o0 m7 f  |0 r3 B, I6 y
61. static volatile int irqraised1 = 0;
    5 u. z- C/ ]6 B/ h  Q- \
62. static volatile int irqraised2 = 0;
    
63. 
    $ q. ?$ c  s. d- C, a
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % ^) U% W) l/ i  L  W' W& U
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;
    , Z4 W% U+ J1 q# G. B& b$ n
69. dma_addr_t dmaphyssrc2 = 0;
    & f6 l/ M% |. x6 w- I* @
70. dma_addr_t dmaphysdest1 = 0;
    3 [; C) H. b& n5 j& l
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    6 k4 v: J+ g3 w$ ~
73. char *dmabufsrc1 = NULL;
    4 J% R0 k$ h8 f! `  p  J
74. char *dmabufsrc2 = NULL;
    ' l9 y& B2 m% f! l. q0 Z/ E
75. char *dmabufdest1 = NULL;
    " l  n/ }% o! P7 g! D. ~
76. char *dmabufdest2 = NULL;
      B* V1 B. r$ o% \7 I
77. 
    ) B6 V' b! x. W4 v5 S( W
78. static int acnt = 512;
    . @2 H1 P* Z. ]; W; n& P
79. static int bcnt = 8;
    5 a$ U" }, e  A( e
80. static int ccnt = 8;
    ( d. h; m* i. B% _1 ^
81. 
    
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

6 x$ `5 h; z/ u  |! K0 H
+ H: ]$ \. v1 c6 ?" g      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
) o3 s/ N' Q8 g# aarm-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。


' B; p$ z6 |: D# C/ y