OMAPL138如何在Linux下使用EDMA3驱动

yyj

# ^) y. N. W, U- G6 v- ^% h

1. [code]EDMA sample test application
   5 O" d' a4 r' B3 ~
2. /*
   2 [' v! {* g: b* X# y
3. * edma_test.c
   3 B; ?. Z$ l* E. R+ F
4. *
   6 f* o5 Q' c5 o# {; o! l" _; D( W
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   ' v( B4 {7 }( M+ Y9 k
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   3 J  y1 l  E4 j
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    2 Z2 \  j/ X* _; a
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    , j! t$ ?5 I- c  b/ l  K
15. * This program is free software; you can redistribute it and/or
    . n3 M7 L+ w6 @4 c- \: W7 V
16. * modify it under the terms of the GNU General Public License as
    8 u/ N8 I) w# `1 N1 }  U$ m
17. * published by the Free Software Foundation version 2.
    9 M2 H' }8 y. h% C- ^% ]/ e& l
18. *
      |1 ~% u7 v5 `4 U' M3 J7 Z% F# o- k
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    . w! l4 R/ x9 G; ]7 o0 i
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " p- g2 u" V. g, O
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    3 p! u( @6 b( Q5 o# X- _
29. #include <linux/interrupt.h>
    . k) \& V& K( w
30. #include <asm/io.h>
    ; v5 H' V8 }; ~
31. #include <linux/moduleparam.h>
    " T; H" w! G( _: k1 W; H# f
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
      G0 q) Q0 N" V7 a8 M1 N4 Q0 R
36. #include <mach/memory.h>
    ! o6 j* ?: E7 d. j% g$ @' e* Z
37. #include <mach/hardware.h>
    . h9 d+ @# j( V
38. #include <mach/irqs.h>
    8 u5 r0 @: K$ v' M' N
39. #include <asm/hardware/edma.h>
    
40. 
    & ]4 U1 U# s7 x: @% Q
41. #undef EDMA3_DEBUG
    # }4 U1 t6 \- P0 D
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    , G2 E! t, J: |* G; [
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " n7 ]) g- X' U) p* _
48. #else
    
49. #define DMA_PRINTK( x... )
    & m7 t8 d$ [( D
50. #define DMA_FN_IN
    & q, [* W7 g9 t7 n+ [
51. #define DMA_FN_OUT
    
52. #endif
    1 g  S- g4 a& [2 h: n- _8 k
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 `' M# L% ?3 b0 L
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    4 ^. I; g0 ]( ?" l7 r+ N
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    ( D" _% E8 s+ V. B% \8 \4 U$ c6 o7 \
59. #define ITCCHEN_SHIFT               23
    # M7 j- {1 k! ^/ @" Z- C; E
60. 
    , b+ g7 i* J& C6 O/ U
61. static volatile int irqraised1 = 0;
    ! t: I( c! `$ S! z( o
62. static volatile int irqraised2 = 0;
    , D& Y+ y. \6 }- d8 d7 U  C5 i
63. 
    3 }$ E0 _6 [% J( M4 \  M4 I1 s  |
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " Q/ ~8 A7 t3 j
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);
    $ N5 j9 }: v: d; c/ E' l
67. 
    & o) [: Z* ~0 X$ ^
68. dma_addr_t dmaphyssrc1 = 0;
    & i! R' c; a, E4 T4 I$ N
69. dma_addr_t dmaphyssrc2 = 0;
    0 B. L0 |2 o5 \. J7 h' |
70. dma_addr_t dmaphysdest1 = 0;
    ! Q8 g0 J3 r6 z5 S
71. dma_addr_t dmaphysdest2 = 0;
    ; v: Q+ d( T) T5 ]" m2 d
72. 
    
73. char *dmabufsrc1 = NULL;
    & ?0 a8 t0 C. B
74. char *dmabufsrc2 = NULL;
    2 z' A# Z! q0 y& N9 T5 g* s
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ) s9 h1 W4 j' j. }% b1 N1 t+ Q' p
79. static int bcnt = 8;
    6 b  R# @, U  C! L
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ! W. t* U0 A4 `6 a
83. module_param(bcnt, int, S_IRUGO);
    6 {; Q- [0 j; _. n6 e6 L
84. module_param(ccnt, int, S_IRUGO);

复制代码

+ d1 Y+ ]8 l3 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
6 M8 X5 _) R) h9 L0 i* u1 b# Varm-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。
' U7 v3 ~7 |: E7 ^. J- a0 A- c

: ~/ u3 m) ~4 Z0 ^' s; N  C8 E1 X