OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   0 `, O8 S" \. W8 w
2. /*
   
3. * edma_test.c
   1 p5 M4 K9 d3 X- [
4. *
   $ B& Y* N5 _5 u# x4 }
5. * brief  EDMA3 Test Application
   
6. *
   3 a' j/ w. N; m/ I- a3 G
7. *   This file contains EDMA3 Test code.
   
8. *
   6 J8 L6 c; a, h. r/ t! F
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ) }+ l- B6 ?" t8 w
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    1 i( ]; e1 s9 X4 z" v% m
11. *         TO CHANGE.
    
12. *
    : ^1 g1 l% M! Q) n
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
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
    " Q$ k  H; E2 q# F. _
17. * published by the Free Software Foundation version 2.
    
18. *
    3 G7 C8 [+ s: b2 ]
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : h9 j9 q- n) p  R2 {% v
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 [$ c; @& y& F$ F" N
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ; w  B3 o4 S) a. x% I8 d6 E
27. #include <linux/errno.h>
    6 U+ w  {, V) }' C/ \7 V; R
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ) d/ W: e" D( }9 f# P+ y/ U
30. #include <asm/io.h>
    # |" P- \( }+ y# n- q
31. #include <linux/moduleparam.h>
      C( A4 Z- I% K7 n/ y
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    * K7 A8 O) ~, V/ R2 Y2 t' s9 X/ n
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    * M, x/ Y! {5 M2 E2 l% H% Q
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
      i1 W+ D2 q3 w  s* D" d( c5 Q
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( F& @- {0 u3 X! R& {
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    3 }6 k! r$ r/ z% U8 o* H
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    . G: O6 S$ ?: b( w$ D: ]
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ! n& s. d5 N4 ]2 M
56. #define TCINTEN_SHIFT               20
    , }& M; X/ s' Z3 p/ h' ]: n( |1 o
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    & J: N1 w2 V/ e, H
60. 
    4 Z. f- L" `  a' `$ G  Z' q
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    3 r3 o& p+ a1 n6 Q. c1 j& s2 u1 L
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 Q+ I. s- ?, 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);
    # _9 ^9 k" T" G+ j
67. 
    ' y. _& u1 {% M# B
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ! r4 e9 {$ L$ V4 |
70. dma_addr_t dmaphysdest1 = 0;
    ( ]$ t2 \6 X# ]2 s) O6 J  }; i/ U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    . ^$ T7 D3 F; H6 `
73. char *dmabufsrc1 = NULL;
    - N; A+ ^3 k, c% G" g9 }
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    8 D, @( q. }7 l1 _% q
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    6 _4 l* g* \( ?4 b- H/ B
80. static int ccnt = 8;
    9 m! H6 K% t0 Z" a
81. 
    0 o7 _+ g5 X& ~; X- z2 p6 A/ D- G
82. module_param(acnt, int, S_IRUGO);
    , r7 A% ?! _. \9 W
83. module_param(bcnt, int, S_IRUGO);
    - V( _# C- }. i& k
84. module_param(ccnt, int, S_IRUGO);

复制代码

8 U( U" U& K2 K- E
( ~6 a8 U! v! z8 ^8 j5 Y2 q" T& x      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
2 w& Y" v- K! h( Xarm-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。
" ?5 L, p7 d. ]5 d: k! y( m. n
+ g4 M& v0 ]4 M9 m! C" n8 E, b