OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   . T2 a- g  O! T$ \" \1 v
3. * edma_test.c
   4 s$ M( }/ i* o% _% X
4. *
   
5. * brief  EDMA3 Test Application
   : M# w' H9 Q9 i, U, g3 X
6. *
   . f8 Z1 m0 ?  J/ E8 T" S
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    7 M& c  m% k/ N+ k$ `
11. *         TO CHANGE.
    4 a- a8 b2 C6 W( o
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    6 O( F$ z8 }% P: r) }! L2 R
14. *
    ' \7 V6 z% V2 I8 d
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
    ( B% F! ]1 ^) E. t
17. * published by the Free Software Foundation version 2.
    
18. *
    ) _" v% w" `" @4 ~
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.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    % z) h7 j% P/ w  B
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    6 M0 @  V  j; ^+ S
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    0 ~' V6 ^4 b" A% j6 R2 b) E; ?
33. #include <linux/mm.h>
    / D' [& a- F  d# C
34. #include <linux/dma-mapping.h>
    6 c( f: [, N* U- Y
35. 
    
36. #include <mach/memory.h>
    5 F" c0 d+ s. A6 L# ?; J1 Q
37. #include <mach/hardware.h>
    ) J8 b4 v, g# p, K9 O
38. #include <mach/irqs.h>
    8 C0 j8 V3 _8 W7 n
39. #include <asm/hardware/edma.h>
    
40. 
    # Y) ]0 q4 I4 K+ C8 A1 [) T
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ( P8 i: c* I' v" L
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    % W7 p  y  ?+ N' i# _  D. ^
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ; ?1 [% U0 @" _4 K  O8 q8 Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' E& l. P" N) m+ n0 O/ f' w4 a
48. #else
    : V& w7 `! f, H/ Q/ h$ s. b
49. #define DMA_PRINTK( x... )
    # b9 G9 e% N7 P' {. ?
50. #define DMA_FN_IN
    # L& [/ x3 _2 F- @7 O8 c
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    7 i; f9 d2 A3 h3 ?+ ?
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    6 i( @2 U$ a) M' M, n
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    0 c( j4 [' L; _+ X4 o1 i' A9 s
62. static volatile int irqraised2 = 0;
    3 G& h7 H3 l) `% H
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 v8 K; f' j9 I
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 d9 I$ G; k* j1 ^# u
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - e) Q' A$ s( T  b8 h
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    . h* E% c9 `2 X8 z
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    ) B; j, \! Y, n1 S) v# C
71. dma_addr_t dmaphysdest2 = 0;
    7 q: T" ]' d0 ]# H) z' O
72. 
    6 j# C( U8 i* `/ w, T3 n* ~
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    : z! @9 g' [  N8 m$ F: s* A2 ?9 O7 M
76. char *dmabufdest2 = NULL;
    . N" L& l4 Q) J( w
77. 
    3 V# u$ M) q5 \$ u4 C- x' y" S: {
78. static int acnt = 512;
    " [* E. N6 V0 }; d# R7 J
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    2 T$ y  n4 t$ @9 H9 ?: O1 f7 i9 x6 o
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 f" d  c4 I- |0 R
83. module_param(bcnt, int, S_IRUGO);
    . w- Z& f  `7 \) p4 J" @
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
; ^" l9 }2 ]& R% 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。
2 A4 G4 Z$ C7 v0 V2 V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
" k0 C+ f( o( Y" \! M% f$ v$ v( T
  a# w# M0 r1 N/ ^