OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 @7 u+ ?; ]4 e; P; A9 h

1. [code]EDMA sample test application
   
2. /*
   3 S1 B- [) U8 W: }
3. * edma_test.c
   
4. *
   2 ]$ w' T4 r5 T, Y  {# G
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   % A% U& n  X4 J
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & k8 R: m9 [( B, z
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ; q4 N4 ^6 n/ S2 e" R
11. *         TO CHANGE.
    ( |6 j% W$ |& G: S' c) V9 h
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    , f0 J7 g5 E1 Z3 f, N
14. *
    
15. * This program is free software; you can redistribute it and/or
    * Q/ R% B! h' N6 k2 p
16. * modify it under the terms of the GNU General Public License as
    ! v/ I2 l/ B' x2 {2 c- P/ ^! t; U
17. * published by the Free Software Foundation version 2.
    
18. *
    # o3 R0 W5 [) Z
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : q2 K3 Z: X3 K. K, ?, y+ i; `
20. * kind, whether express or implied; without even the implied warranty
    * F/ v1 N/ o$ r. D6 T; J
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ; L6 _% H8 q$ b9 R9 o
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    5 ]. `/ j4 T2 e* P
26. #include <linux/init.h>
    + A+ I0 k# Q8 a1 B% s
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      }+ ^9 U9 `- E1 b' ^2 G  l
29. #include <linux/interrupt.h>
    ' R) k! a9 F& z6 R$ v8 G* z
30. #include <asm/io.h>
    ' N4 t& b. v1 X: o$ y* z2 f+ P( W% Z
31. #include <linux/moduleparam.h>
    # T0 X  z# ~2 p' S( S5 E! t2 H
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    0 V, T7 p' `% i- L  Y
39. #include <asm/hardware/edma.h>
    6 Y& A' Z$ k# X7 p! N* l0 Z
40. 
    0 K& ^$ E+ v" P* G
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / E5 f3 f" q0 [2 N
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 l  \6 ~8 n4 }: E6 o
48. #else
    
49. #define DMA_PRINTK( x... )
    ' D$ h+ k9 W2 k" X4 B
50. #define DMA_FN_IN
    7 m6 p/ s$ x4 [
51. #define DMA_FN_OUT
    : H: F" e! k. D* s% Y7 ]/ E
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    6 `% x: i; g3 d, z8 R2 |, J
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    1 n: n6 ~% t0 S, W% Z$ c
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    5 I: @* Z  \! q5 e: Z$ i; N$ o/ l
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    7 R* s- b3 o3 ^! O* p+ Y9 u
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ; t$ o; \- R) J8 q+ J5 y" u! L- h
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);
    # S9 ^9 S7 j: u4 x1 L
67. 
    + @/ C. J0 m: A. c
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ! Y/ g( U% _' ~# u, W" `% }1 i
72. 
    3 {  S1 a; L/ }% A0 s: q
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) j5 H" A8 U6 i* m8 u
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    4 D: N- K& J5 D, |, z# Z" p- z7 a
80. static int ccnt = 8;
    % b% N( r) P4 k9 Q; m
81. 
    
82. module_param(acnt, int, S_IRUGO);
    + U: T4 s. ]8 G/ }; Q3 L
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

# ?, `: Y. T5 U5 c, 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
0 E$ _  Q* d& t( D% Y: Parm-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。


' u' d2 G4 }! L7 ]7 l